This book __________ (belong) to Keerthi.

When 'Be' is used to form other tenses it is called ______________ .

Choose the right sentence.

 I _____________ (have) a laptop.

Identify the sentence in which 'have' expresses possession.

Choose the correct answer.
The teacher _________ (take) extra classes for weak students.

I am _______ (have) an exam tomorrow.

She always ___________ (come) late.

I _________ (think) therefore I exist.

Auxiliary verbs are __________ .