How often / how long / what time / when

What and which

Subject and object questions

Most questions are object questions. They ask about an object.

• Where do you live?
• Who did you see? 

And there are also subject questions. Questions we ask to find out about the subject. These questions are asked using 'who', 'what' and 'which'.  

• Who plays football in this class?
• What happened?
• Which machine did Marconi invent? 

You can take a look at the following chart of question forms:

Form	Examples
Object Questions wh- + auxiliary + subject + main verb	Where do you live? What will you do? When is she coming?
Subject Questions wh- (=subject) + auxiliary + main verb Notice that this structure is like affirmative sentence structure without the question word.	Who loves you? Which car will arrive first? What type of food costs less?

Subject object questions from Ana Arias Castro

SOME MORE EXERCISES:

• Perfect English
• ESL Lounge
• English Zone
• Learn English - British Council
• Servator

How often / how long / when / what time

Question words in English

Question words (for kids) from Christina Zubova

Question words for little kids from Danitza Lazcano Flores

EXERCISES:

• Choose the right question for each answer.
• Choose the right question word
• Write the correct question word
• Choose the right question word
• 2 exercises on question words and questions

Asking for personal information

Personal information 1ºeso from Ana Arias Castro

Question words

Question words (for kids) from Christina Zubova

Question words for little kids from Danitza Lazcano Flores

EXERCISES:

• Choose the right question for each answer.
• Choose the right question word
• Write the correct question word
• Choose the right question word
• 2 exercises on question words and questions