Subject questions ask about who or what is doing the action. In subject questions, the question word is used as the subject of the verb.
The 3 elements to form subject questions are:
-
A question word is acting as the subject.
-
The verb is the action.
-
The object is additional information, added when necessary.

The question words used in subject questions are:
Question |
Asking about |
|
Who |
people |
|
What |
things & actions |
These questions words can be conbined See examples below. |
Which |
choice |
|
Whose |
possession |
Question |
verb |
object |
Who |
said |
that? |
Who |
is working |
tonight? |
What |
happened? |
* |
What |
is going |
on? |
Question |
noun |
verb |
object |
What |
colours |
match |
my eyes? |
Which |
computer |
works |
better? |
Whose |
idea |
helps |
the most? |
*Object unnecessary for the question.