How Do We Form Questions in English?

To ask a question in English, we usually change the order of words in a sentence. This often involves moving a verb or adding a special “helper” verb, called an auxiliary verb.

The main goal is to put the verb or auxiliary verb before the subject of the sentence. This is different from how you make statements.

• Statement: You are happy.
• 質問： Are you happy?

Asking Questions with the Verb Be

When your main verb is be (am, is, are, was, were), forming a question is simple. You just move the form of be to the beginning of the sentence, before the subject.

• Statement: She is a student.
• 質問： Is she a student?
• Statement: They were late.
• 質問： Were they late?

You do not use an auxiliary verb like do with the verb be.

Asking Questions with Other Main Verbs

For most other verbs in English (not be or modal verbs), we use an auxiliary verb to form questions. The most common auxiliaries are do, does, 、および did.

• 使用方法 do ～のために I, you, we, they in the present simple.
• 使用方法 does ～のために he, she, it in the present simple.
• 使用方法 did for all subjects in the past simple.

The structure is: Auxiliary verb + Subject + Main verb (base form).

• Statement: You live here.
• 質問： Do you live here?
• Statement: He works on Saturdays.
• 質問： Does he work on Saturdays?
• Statement: They arrived yesterday.
• 質問： Did they arrive yesterday?

Remember, the main verb always returns to its base form (infinitive without to) after do, does, did.

Using Modal Verbs in Questions

Modal verbs like can, could, will, would, should, must, might, may also act as auxiliary verbs. To form a question with a modal verb, you simply place the modal verb before the subject.

• Statement: You can speak English.
• 質問： Can you speak English?
• Statement: I should go.
• 質問： Should I go?

You do not use do with modal verbs. The main verb after the modal verb stays in its base form.

What Are Wh- Questions?

Wh- questions ask for specific information. They start with a question word, followed by the usual question structure (auxiliary/verb be + subject + main verb).

Common Wh- words include:

• Who (for people)
• What (for things, ideas, actions)
• Where (for places)
• When (for time)
• Why (for reasons)
• Which (for choices)
• Whose (for possession)
• How (for manner, condition, or degree)

The structure is: Wh- word + Auxiliary/Verb Be + Subject + Main Verb (if any).

• Where do you live?
• What is your name?
• Why did she leave early?

Asking for Descriptions: Be Like 対. How...Be

When you want to ask for a description or an opinion about something or someone, you can use two common patterns:

• What...be...like? This asks for a general description or opinion.
• What was the party like yesterday? (Asking for a description of the party.)
• What is your new teacher like? (Asking for a description of the teacher's personality.)

• How...be...? This asks about the condition or state of something or someone, often expecting a simple adjective answer.
• How was your holiday? (Asking about the condition or experience of the holiday, e.g., good/bad.)
• How are you today? (Asking about your current state or health.)

While both can seem similar, what...like is broader for descriptions, and how...be is more about current state or general well-being.

例

• Are you ready for the meeting?
• Does he speak French fluently?
• Where did they go last night?
• Can I help you with that heavy box?
• What time does the train depart?
• Why are you studying English?
• How was your weekend?
• What is the weather like in London today?

練習

スペイン語話者がよく犯す間違い

Spanish speakers often make a few common mistakes when forming questions in English:

• Using do with be: In Spanish, you might not use an auxiliary verb in the same way. Remember, be is strong enough on its own.
  • 誤り： Do you are happy?
  • 正しい： Are you happy?
• Not using do/does/did with other verbs: You must use an auxiliary for most verbs.
  • 誤り： You live here? (Unless it's an informal rising intonation question, but grammatically incorrect for standard questions.)
  • 正しい： Do you live here?
• Changing the main verb after do/does/did: The main verb must always be in its base form.
  • 誤り： Does she lives here?
  • 正しい： Does she live here?
• Confusing What...like そして How...be: Remember what...like for general descriptions and how...be for condition/state.
  • Incorrect for description: How is your new car? (If you want to know its features, not just its condition.)
  • Correct for description: What is your new car like?

よくある質問

Do I always need an auxiliary verb to form a question?

No. If the main verb is be or a modal verb (like can, should), you just move that verb before the subject. You only need do/does/did for other main verbs.

What is the difference between Who and Whom?

Who is used when the person is the subject of the verb (e.g., Who called?). Whom is used when the person is the object of the verb or a preposition (e.g., To whom did you speak?). In modern English, whom is very formal and often replaced by who in casual speech.

Can I make a question just by changing my voice?

Yes, in informal spoken English, you can sometimes turn a statement into a question by using a rising intonation at the end (e.g., You're leaving?). However, for grammatically correct and formal questions, you should follow the standard structures with verb inversion or auxiliary verbs.

関連レッスン

• Question forms