Auxiliary verbs

1. Auxiliary verbs

1.2
Auxiliary verbs
1 The Present Continuous uses the auxiliary verb to be in all forms.
Positive
Negative
Question
I’m studying.
We aren’t staying.
What’s she doing?
2 In the Present Simple and the Past Simple we use the auxiliary
verb do in the questions and negatives. There is no auxiliary verb
in the positive.
Positive
Negative
Question
We have 2 cats.
She doesn’t like coffee. Did you find your phone?
I took the train.
She didn’t study at all.
Where did they go?
© Oxford University Press

2. Auxiliary verbs

1.2
Auxiliary verbs
Complete the sentences with the correct auxiliary, if necessary.
1 Where / you / stay / last night?
Where did you stay last night?
2 John / not / work / this week.
John isn’t working this week.
3 Lara / arrive / yesterday.
Lara arrived yesterday.
4 What / you / read now?
What are you reading now?
5 I / not / see Paul in Berlin.
I didn’t see Paul in Berlin.
© Oxford University Press