What Are Subject Questions?

A subject question asks about the person or thing that performs the action of the verb. The question word (who, what, which) acts as the subject of the sentence.

Because the question word is the subject, we do not use an auxiliary verb (do, does, did) in subject questions. The structure is like a normal statement, but with a question word at the beginning.

• Structure: Question word + Main verb + (Object)
• 例： Who called you? (Someone called you. ‘Who’ is the subject.)
• 例： What happened? (Something happened. ‘What’ is the subject.)

What Are Object Questions?

ある object question asks about the person or thing that receives the action of the verb. The question word (who, what, which) is the object of the verb.

In object questions, we almost always use an auxiliary verb (do, does, did, is, are, have, has, or a modal verb). This auxiliary verb comes before the subject.

• Structure: Question word + Auxiliary verb + Subject + Main verb + (Object/Complement)
• 例： Who did you call? (You called someone. 'Who' is the object.)
• 例： What are you eating? (You are eating something. 'What' is the object.)

How Can You Identify Subject and Object Questions?

The easiest way to tell the difference is to look for the auxiliary verb do, does, 、または did.

• If there is NO do/does/did (and the main verb is not be or a modal), it is usually a subject question.
• If there IS a do/does/did, it is an object question.

Another way is to imagine the answer. If the answer replaces the question word and is the 'doer' of the action, it's a subject question. If the answer is the 'receiver' of the action, it's an object question.

Where Do Prepositions Go in Questions?

When a question involves a preposition, the preposition usually goes at the end of the question, especially in informal or common English.

• 例： Who are you talking to? (Not: *To whom are you talking? - this is very formal and less common.)
• 例： What are you looking for?
• 例： Which book are you interested in?

'What... like?' vs. 'How...?'

These two question forms can be confusing, but they have different uses.

• 当社では What... like? to ask for a description of a person, place, or thing. It asks about characteristics or qualities.
• 例： What's your new teacher like? (Answer: She's very friendly and helpful.)
• 例： What was the party like? (Answer: It was lively and fun.)

• 当社では How...? to ask about health, well-being, or the general state of something.
• 例： How's your sister? (Answer: She's feeling much better, thanks.)
• 例： How was your holiday? (Answer: It was great! - here, How is also common for a general opinion.)

例

• Who broke the window?
• What made that noise?
• Which car won the race?
• Who did you meet yesterday?
• What are you reading?
• Which movie did you watch?
• Who is coming to the party?
• What did she give you?
• Who are you waiting for?
• What does he look like?

練習

スペイン語話者がよく犯す間違い

Spanish speakers often make a common mistake when forming subject questions: they add an auxiliary verb (do, does, did) where it is not needed.

In Spanish, questions often use an auxiliary structure or invert the subject and verb, which can lead to confusion in English.

• 誤り： *Who did call you?
• 正しい： Who called you? (ここでは、, who is the subject, so no did is needed.)

• 誤り： *What does happen next?
• 正しい： What happens next? (Again, what is the subject.)

Remember, if the question word is the subject, treat the question like a statement and do not add do/does/did.

よくある質問

What is the main difference between subject and object questions?

The main difference is what the question word refers to. In a subject question, the question word (who, what, which) is the subject (the doer of the action). In an object question, the question word is the object (the receiver of the action).

Do all questions in English need an auxiliary verb?

No, not all questions. Subject questions generally do not use an auxiliary verb like do, does, 、または did. 例えば、, Who lives here? does not need an auxiliary verb because who is the subject.

Can I use 'which' in both subject and object questions?

はい、ご利用いただけます which in both types. For example, Which student answered the question? is a subject question. Which student did you choose? is an object question.

How can practicing subject and object questions help me with English exams?

Many B1 English exams, especially writing and speaking sections, require you to form clear and correct questions. Understanding subject and object questions will help you avoid common errors and improve your fluency and accuracy when asking for information or opinions.