Subject and object questions (Câu hỏi chủ từ và túc từ)

Subject and object questions
Use:
Some questions ask about the object of a sentence.
Who did you see? => I saw Helen.
Helen is the object of the sentence.
Who saw you?=> Nobody saw me.
Nobody is the subject of the sentence.
Subject and Object questions have different structures.
Form:
Subject Questions
1)To be
Use to be before a subject + nouns, adjective or place.

to be Subject
Is / Was

he / she / it / Tom

a teacher / a student?
happy / cold / tired / ready?
at the party / in the classroom?
here / there?
Are / Were we / you / they / your parents

teachers / students?
happy / cold / tired / ready?
at the party / in the classroom?
here / there?
Is Tom a teacher? Is it cold? Was he at the party? Is she here?
Are you students? Were you tired? Are they in the classroom? Were you parents there?
2)Use Question word + to be before nouns, pronouns, places and this / that.

Question word be
Where
Who
is / was

he / she / it / my bag?
this / that?
at the party / in the classroom?
are / were we / you / they / my keys?
What
When
these / those?
at the party / in the classroom?
Who is it? When was it? Where was my bag? Who was at the party?
Where are my keys? What are those?
3)Use (Question word) + auxiliary verb before a subject + verb
Question word auxiliary verb Subject

Where
Who
What
is / are
was / were

you
he
she
doing seeing
going eating
do / does

did
do see
go eat
can / could
will / would
should
do see
go eat
have / has
had
done saw
gone eaten
Where are you going? Who did you see? What did you do? When will we go? Why have they
gone?
Object Questions

1)Object questions have no subject in the question. Any present / past simple verbs should go in
the past / present simple tense, not the infinitive form.
Only What and Who can be used in this kind of question.
Question word verb object
Who

likes / needs / wants
is following / calling
saw / called
me / you / him / her / us / them?
the film?

What happened (to
is happening (to

me / you / him / her / us / them?)
Who likes me? What happened to you?
In the present tense, always use the third person singular form of the verb.
What happens next? NOT What happen next?
Common mistakes:
1) Some students use an auxiliary verb in an subject question.
What did happen? => What happened?
Who did meet you at the station?=> Who met you at the station?