4.20 'wh'-word as object or adverb

When a 'wh'-word is the object of a verb or preposition, or when it forms part of the object, or when it is an adverb, the position of the subject is the usual one in the interrogative mood, i.e it comes after the first verb in the clause.

• What am I going to do without you?
• Which graph are you going to use?
• Why has Cherubini written this?
• When would you be coming down?

If you are using the simple present tense or the simple past tenseof any verb except 'be', you put 'do', 'does', or 'did' in front of the subject.

• What do you really think?
• Which department do you want?
• Where does she live?
• How do you know what it's like?
• When did you last see John Cartwright?

If you are using the simple present tense or the simple past tense of 'be', the main verb goes in front of the subject. You do not use 'do', 'does', or 'did'.

• Where is the station?
• How was your meeting?
• When was the last time you cleaned the garage?