Exercise 

4

 Write a right form of the verbs in brackets in the gaps 

 1.

 _____ you ever _____ a silent film? (see)

 2.

 I _____ much last week. (not study)

 3.

She ______ her best friend for more than eighteen years. (know)

 4.

How long _______  you ______ here? (be)

 5.

Mary _____ at home yesterday. (not be)