{"id":273206,"date":"2026-09-07T03:00:42","date_gmt":"2026-09-07T08:00:42","guid":{"rendered":"https:\/\/langcom.org\/?p=273206"},"modified":"2026-09-07T03:00:42","modified_gmt":"2026-09-07T08:00:42","slug":"have-to-obligation-a2-a2-key","status":"publish","type":"post","link":"https:\/\/langcom.org\/ja\/blog\/have-to-obligation-a2-a2-key\/","title":{"rendered":"Learn &#8216;Have to&#8217; for Obligation (A2 English Grammar)"},"content":{"rendered":"<div class=\"lc-answer\"><strong><span data-no-translation>Have to<\/span><\/strong> is a very common English expression used to talk about things that are <strong>necessary<\/strong> \u307e\u305f\u306f <strong>obligatory<\/strong>. It shows that there is a rule, a law, or an external situation that makes an action required. For example, <span data-no-translation>I have to wear a uniform at work<\/span> means it&#8217;s a rule from your employer. We use <span data-no-translation>have to<\/span> when the obligation comes from outside the speaker. When something is <strong>not necessary<\/strong>, we use <strong><span data-no-translation>don&#8217;t have to<\/span><\/strong> \u307e\u305f\u306f <strong><span data-no-translation>doesn&#8217;t have to<\/span><\/strong>. For instance, <span data-no-translation>You don&#8217;t have to work on Sundays<\/span> means it&#8217;s optional. This is different from <span data-no-translation>mustn&#8217;t<\/span>, which means something is forbidden. Think of <span data-no-translation>have to<\/span> as similar to &#8220;tener que&#8221; in Spanish. It&#8217;s important to remember that <span data-no-translation>have to<\/span> uses <span data-no-translation>do<\/span> \u307e\u305f\u306f <span data-no-translation>does<\/span> for questions and negative sentences, just like regular verbs, not like typical modal verbs. This makes its structure unique.<\/div>\n<h2>What Does &#8216;Have to&#8217; Mean?<\/h2>\n<p><span data-no-translation>Have to<\/span> means that something is necessary. It shows an obligation, often because of a rule, a law, or a situation.<\/p>\n<p>This obligation usually comes from outside the speaker. It&#8217;s not a personal feeling, but something required by others or circumstances.<\/p>\n<ul>\n<li>For example, <span data-no-translation>Students have to study for exams.<\/span> (This is a rule from the school.)<\/li>\n<li>Another example: <span data-no-translation>I have to go to work early tomorrow.<\/span> (This is an obligation from your job.)<\/li>\n<\/ul>\n<div class=\"lc-cta lc-cta-placement\" style=\"border-radius:14px;padding:30px;margin:30px 0;text-align:center;color:#fff;background:linear-gradient(135deg,#2B87DA,#29C4A9);\"><h3 style=\"color:#fff;font-size:22px;font-weight:800;margin:0 0 8px;\">\u270d\ufe0f \u81ea\u5206\u306e\u30ec\u30d9\u30eb\u304c\u308f\u304b\u3089\u306a\u3044\uff1f<\/h3><p style=\"margin:0 0 16px;opacity:.95;\">\u7121\u6599\u306e\u30ec\u30d9\u30eb\u5224\u5b9a\u30c6\u30b9\u30c8\u3092\u53d7\u3051\u3066\u3001\u30b1\u30f3\u30d6\u30ea\u30c3\u30b8\u8a8d\u5b9a\u8a66\u9a13\u5b98\u304b\u3089\u3042\u306a\u305f\u306b\u5408\u308f\u305b\u305f\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u53d7\u3051\u53d6\u308a\u307e\u3057\u3087\u3046\u3002.<\/p><a href=\"\/ja\/%e3%82%a4%e3%83%b3%e3%82%b0%e3%83%aa%e3%83%83%e3%82%b7%e3%83%a5\/%e3%82%a2%e3%82%ab%e3%83%87%e3%83%9f%e3%83%bc\/%e7%84%a1%e6%96%99%e4%bd%93%e9%a8%93\/\" style=\"display:inline-block;margin-top:8px;padding:13px 30px;border-radius:8px;font-weight:700;text-decoration:none;background:#0A2540;color:#fff;\">\u7121\u6599\u30d7\u30ec\u30a4\u30b9\u30e1\u30f3\u30c8\u30fb\u30c6\u30b9\u30c8\u3092\u53d7\u3051\u308b<\/a><\/div>\n<h2>How Do We Form 'Have to'?<\/h2>\n<p>The structure of <span data-no-translation>have to<\/span> changes depending on the subject and whether it's positive, negative, or a question.<\/p>\n<h3>Positive Sentences<\/h3>\n<ul>\n<li>\uff5e\u306b\u3064\u3044\u3066 <span data-no-translation>I, You, We, They<\/span>, use <span data-no-translation>have to + base verb<\/span>.<\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>We have to finish this report today.<\/span><\/p>\n<ul>\n<li>\uff5e\u306b\u3064\u3044\u3066 <span data-no-translation>He, She, It<\/span>, use <span data-no-translation>has to + base verb<\/span>.<\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>She has to wake up early for her flight.<\/span><\/p>\n<h3>Negative Sentences<\/h3>\n<p>To say something is not necessary, we use <span data-no-translation>don't have to<\/span> \u307e\u305f\u306f <span data-no-translation>doesn't have to<\/span>.<\/p>\n<ul>\n<li>\uff5e\u306b\u3064\u3044\u3066 <span data-no-translation>I, You, We, They<\/span>, use <span data-no-translation>don't have to + base verb<\/span>.<\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>You don't have to pay for this. It's free.<\/span><\/p>\n<ul>\n<li>\uff5e\u306b\u3064\u3044\u3066 <span data-no-translation>He, She, It<\/span>, use <span data-no-translation>doesn't have to + base verb<\/span>.<\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>He doesn't have to work on weekends.<\/span><\/p>\n<h3>Questions<\/h3>\n<p>\u5f53\u793e\u3067\u306f <span data-no-translation>Do<\/span> \u307e\u305f\u306f <span data-no-translation>Does<\/span> to ask questions with <span data-no-translation>have to<\/span>.<\/p>\n<ul>\n<li>\uff5e\u306b\u3064\u3044\u3066 <span data-no-translation>I, You, We, They<\/span>, use <span data-no-translation>Do + subject + have to + base verb?<\/span><\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>Do we have to bring our passports?<\/span><\/p>\n<ul>\n<li>\uff5e\u306b\u3064\u3044\u3066 <span data-no-translation>He, She, It<\/span>, use <span data-no-translation>Does + subject + have to + base verb?<\/span><\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>Does she have to wear a uniform?<\/span><\/p>\n<h3>Short Answers<\/h3>\n<p>\u5f53\u793e\u3067\u306f <span data-no-translation>do\/don't<\/span> \u307e\u305f\u306f <span data-no-translation>does\/doesn't<\/span> in short answers.<\/p>\n<ul>\n<li><span data-no-translation>Yes, I do. \/ No, I don't.<\/span><\/li>\n<li><span data-no-translation>Yes, he does. \/ No, he doesn't.<\/span><\/li>\n<\/ul>\n<h2>When Do We Use 'Have to'?<\/h2>\n<p>You will use <span data-no-translation>have to<\/span> in many everyday situations to talk about different types of necessity and obligation.<\/p>\n<ul>\n<li><strong>Rules and Laws:<\/strong> When something is required by law or a general rule.<\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>You have to stop at a red light.<\/span><\/p>\n<ul>\n<li><strong>Obligations from Others:<\/strong> When someone else (like a boss, a teacher, or parents) requires you to do something.<\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>My children have to clean their rooms every Saturday.<\/span><\/p>\n<ul>\n<li><strong>Necessity:<\/strong> When an action is simply necessary because of a situation.<\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>I have to buy some food; the fridge is empty.<\/span><\/p>\n<ul>\n<li><strong>Lack of Obligation:<\/strong> \u4f7f\u7528\u65b9\u6cd5 <span data-no-translation>don't have to<\/span> \u307e\u305f\u306f <span data-no-translation>doesn't have to<\/span> when something is not necessary or optional.<\/li>\n<\/ul>\n<p>\u4f8b\uff1a <span data-no-translation>We don't have to go to the meeting if we are busy.<\/span><\/p>\n<table>\n<caption>Forms of &#039;&lt;span data-no-translation&gt;Have to&lt;\/span&gt;&#039;<\/caption>\n<thead>\n<tr>\n<th>Subject<\/th>\n<th>Positive<\/th>\n<th>Negative<\/th>\n<th>Question<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-no-translation>I \/ You \/ We \/ They<\/span><\/td>\n<td><span data-no-translation>have to go<\/span><\/td>\n<td><span data-no-translation>don't have to go<\/span><\/td>\n<td><span data-no-translation>Do I have to go?<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-no-translation>He \/ She \/ It<\/span><\/td>\n<td><span data-no-translation>has to go<\/span><\/td>\n<td><span data-no-translation>doesn't have to go<\/span><\/td>\n<td><span data-no-translation>Does he have to go?<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u4f8b<\/h2>\n<ul>\n<li><span data-no-translation>I have to study for my A2 Key exam.<\/span><\/li>\n<li><span data-no-translation>She has to finish her homework before dinner.<\/span><\/li>\n<li><span data-no-translation>We don't have to work on public holidays.<\/span><\/li>\n<li><span data-no-translation>Does he have to wear a tie for the interview?<\/span><\/li>\n<li><span data-no-translation>They have to be at the airport by 7 AM.<\/span><\/li>\n<li><span data-no-translation>You don't have to apologize; it was not your fault.<\/span><\/li>\n<\/ul>\n<h2>\u7df4\u7fd2<\/h2>\n<div class=\"h5p-iframe-wrapper\"><iframe id=\"h5p-iframe-1124\" class=\"h5p-iframe\" data-content-id=\"1124\" style=\"height:1px\" src=\"about:blank\" frameborder=\"0\" scrolling=\"no\" title=\"KET02 L7 GRAMMAR have to\"><\/iframe><\/div>\n<div class=\"lc-cta lc-cta-exam\" style=\"border-radius:14px;padding:30px;margin:30px 0;text-align:center;color:#fff;background:#0A2540;\"><h3 style=\"color:#F2B705;font-size:22px;font-weight:800;margin:0 0 8px;\">\u8a8d\u5b9a\u8a3c\u3092\u53d6\u5f97\u3059\u308b\u6e96\u5099\u306f\u3067\u304d\u3066\u3044\u307e\u3059\u304b\uff1f<\/h3><p style=\"margin:0 0 16px;opacity:.92;\">Langcom\u306f\u3001\u30b1\u30f3\u30d6\u30ea\u30c3\u30b8\u8a66\u9a13\u3001IELTS\u3001TOEFL\u3001DELE\u3001SIELE\u3001\u304a\u3088\u3073Michigan\u306e\u8a66\u9a13\u5bfe\u7b56\u30b3\u30fc\u30b9\u3067\u3059\u3002.<\/p><a href=\"\/ja\/\" style=\"display:inline-block;margin-top:8px;padding:13px 30px;border-radius:8px;font-weight:700;text-decoration:none;background:#F2B705;color:#0A2540;\">Langcom\u306e\u4f7f\u3044\u65b9<\/a><\/div>\n<h2>\u30b9\u30da\u30a4\u30f3\u8a9e\u8a71\u8005\u304c\u3088\u304f\u72af\u3059\u9593\u9055\u3044<\/h2>\n<h3>Confusing 'Don't Have to' with 'Mustn't'<\/h3>\n<p>Many Spanish speakers confuse <span data-no-translation>don't have to<\/span> \uff5e\u3068 <span data-no-translation>mustn't<\/span>. They have very different meanings:<\/p>\n<ul>\n<li><span data-no-translation>Don't have to<\/span> means 'it is not necessary'.<\/li>\n<li><span data-no-translation>Mustn't<\/span> means 'it is forbidden' or 'you are not allowed'.<\/li>\n<\/ul>\n<p>\u8aa4\u308a\uff1a <span data-no-translation>You mustn't go to school on Saturday.<\/span> (This means it is forbidden to go.)<\/p>\n<p>\u6b63\u3057\u3044\uff1a <span data-no-translation>You don't have to go to school on Saturday.<\/span> (This means it is not necessary to go; it's optional.)<\/p>\n<h3>Incorrect Auxiliary Verbs for Questions and Negatives<\/h3>\n<p>Remember that <span data-no-translation>have to<\/span> is not a true modal verb. It uses <span data-no-translation>do\/does<\/span> for questions and negatives.<\/p>\n<p>\u8aa4\u308a\uff1a <span data-no-translation>Has she to work?<\/span> \u307e\u305f\u306f <span data-no-translation>She hasn't to work.<\/span><\/p>\n<p>\u6b63\u3057\u3044\uff1a <span data-no-translation>Does she have to work?<\/span> \u307e\u305f\u306f <span data-no-translation>She doesn't have to work.<\/span><\/p>\n<h3>Forgetting 's' for Third Person Singular<\/h3>\n<p>Like regular verbs, <span data-no-translation>have to<\/span> changes for <span data-no-translation>he\/she\/it<\/span>.<\/p>\n<p>\u8aa4\u308a\uff1a <span data-no-translation>He have to go.<\/span><\/p>\n<p>\u6b63\u3057\u3044\uff1a <span data-no-translation>He has to go.<\/span><\/p>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<h3>Is 'have to' a modal verb?<\/h3>\n<p><span data-no-translation>Have to<\/span> is often called a \"semi-modal\" or \"modal-like expression.\" It expresses obligation like modal verbs (<span data-no-translation>must<\/span>, <span data-no-translation>should<\/span>), but it uses <span data-no-translation>do\/does<\/span> for questions and negatives, and changes form for the third person singular (<span data-no-translation>has to<\/span>). True modal verbs do not do this.<\/p>\n<h3>What is the difference between 'have to' and 'must'?<\/h3>\n<p>For A2 learners, remember that <span data-no-translation>have to<\/span> usually expresses an obligation that comes from outside (a rule, a law, another person's authority). For example, <span data-no-translation>I have to wear a helmet when I ride my bike<\/span> (it's the law). <span data-no-translation>Must<\/span> often expresses a strong personal obligation or a rule that the speaker feels is important. For example, <span data-no-translation>I must call my mother tonight<\/span> (I feel it's important).<\/p>\n<h3>How do I use 'have to' in the A2 Key exam?<\/h3>\n<p>In the A2 Key (KET) exam, you might see <span data-no-translation>have to<\/span> in Reading and Writing tasks. For example, you might need to complete sentences, choose the correct option in multiple-choice questions, or understand conversations where people talk about rules, duties, or things they need to do. Pay attention to the correct form (<span data-no-translation>have to<\/span>, <span data-no-translation>has to<\/span>, <span data-no-translation>don't have to<\/span>, <span data-no-translation>doesn't have to<\/span>) and the context.<\/p>\n<h3>Can I use 'had to' for the past?<\/h3>\n<p>Yes! To talk about past obligations or necessities, we use <span data-no-translation>had to<\/span>. \u4f8b\u3048\u3070\u3001, <span data-no-translation>Yesterday, I had to work late<\/span>. The negative is <span data-no-translation>didn't have to<\/span>, and the question is <span data-no-translation>Did you have to...?<\/span><\/p>\n<h2>\u95a2\u9023\u30ec\u30c3\u30b9\u30f3<\/h2>\n<ul>\n<li><a href=\"https:\/\/langcom.org\/ja\/?p=272776\">Modal verbs<\/a><\/li>\n<li><a href=\"https:\/\/langcom.org\/ja\/?p=273037\">Modal verbs<\/a><\/li>\n<li><a href=\"https:\/\/langcom.org\/ja\/?p=273133\">Modal verbs<\/a><\/li>\n<li><a href=\"https:\/\/langcom.org\/ja\/?p=273153\">Modal verbs<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Have to is a very common English expression used to talk about things that are necessary or obligatory. It shows that there is a rule, a law, or an external situation that makes an action required. For example, I have to wear a uniform at work means it&#8217;s a rule from your employer. We use have to when the obligation comes from outside the speaker. When something is not necessary, we use don&#8217;t have to or doesn&#8217;t have to. For instance, You don&#8217;t have to work on Sundays means it&#8217;s optional. This is different from mustn&#8217;t, which means something is forbidden. Think of have to as similar to &#8220;tener que&#8221; [&hellip;]<\/p>\n","protected":false},"author":192,"featured_media":274088,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"bwfblock_default_font":"","langcom_teaches":"Modal verbs","langcom_cefr":"A2","langcom_type":"grammar","langcom_faq":"[{\"q\": \"Is 'have to' a modal verb?\", \"a\": \"<span data-no-translation>Have to<\/span> is often called a \\\"semi-modal\\\" or \\\"modal-like expression.\\\" It expresses obligation like modal verbs (<span data-no-translation>must<\/span>, <span data-no-translation>should<\/span>), but it uses <span data-no-translation>do\/does<\/span> for questions and negatives, and changes form for the third person singular (<span data-no-translation>has to<\/span>). True modal verbs do not do this.\"}, {\"q\": \"What is the difference between 'have to' and 'must'?\", \"a\": \"For A2 learners, remember that <span data-no-translation>have to<\/span> usually expresses an obligation that comes from outside (a rule, a law, another person's authority). For example, <span data-no-translation>I have to wear a helmet when I ride my bike<\/span> (it's the law). <span data-no-translation>Must<\/span> often expresses a strong personal obligation or a rule that the speaker feels is important. For example, <span data-no-translation>I must call my mother tonight<\/span> (I feel it's important).\"}, {\"q\": \"How do I use 'have to' in the A2 Key exam?\", \"a\": \"In the A2 Key (KET) exam, you might see <span data-no-translation>have to<\/span> in Reading and Writing tasks. For example, you might need to complete sentences, choose the correct option in multiple-choice questions, or understand conversations where people talk about rules, duties, or things they need to do. Pay attention to the correct form (<span data-no-translation>have to<\/span>, <span data-no-translation>has to<\/span>, <span data-no-translation>don't have to<\/span>, <span data-no-translation>doesn't have to<\/span>) and the context.\"}, {\"q\": \"Can I use 'had to' for the past?\", \"a\": \"Yes! To talk about past obligations or necessities, we use <span data-no-translation>had to<\/span>. For example, <span data-no-translation>Yesterday, I had to work late<\/span>. The negative is <span data-no-translation>didn't have to<\/span>, and the question is <span data-no-translation>Did you have to...?<\/span>\"}]","_kiss_seo_title":"","_kiss_seo_excerpt":"Have to is a very common English expression used to talk about things that are necessary or obligatory.","_mwseo_canonical":"","_mwseo_keywords":"","_mwseo_primary_category":0,"footnotes":""},"categories":[618],"tags":[651,981],"formats":[],"class_list":["post-273206","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a2-key-ket","tag-grammar","tag-have-to"],"dsm_author":{"name":"\u30e9\u30a6\u30eb","avatar_url":"https:\/\/langcom.org\/wp-content\/uploads\/nsl_avatars\/1de86ea706740d324aaef3dd8bf0843b.png","archive_link":"https:\/\/langcom.org\/ja\/blog\/author\/raulmaguinahamann\/","biodata":""},"dsm_categories":[{"term_name":"A2 Key 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