"Who made the coffee?"Originally Posted by VAIN_ABSURD
In this sentence somebody made the coffee.
Therefore 'Who' is the subect and 'the coffee' is the object. When who is the subject in a question we do not use an auxilliary verb.
If 'Who' was the object then you need the auxilliary verb:-
'The coffee poisoned me.'
Then the question would be:-
Who did the coffee poison?
Here 'Who' is the object and 'the coffee' the subject.
Obviously you can't think every time you form a question - subject / object? So it is best to get a feel for questions with lots of practice.
Hope this helps 8)
Lynne at Learn English