А. Present Indefinite

А. I know this surgeon to have operated on successfully

Б. I know that he studies

В. The appetite increases

Г. Lung abscess may develop because of various factors.

Д. We shall have completed our work
721. Choose the sentence with Present Perfect:

А. I have not seen him since he graduated from the institute

Б. We suggested that he would inform us about his work

В. Let the students take part in this research work

Г. We shall have completed our experiments by the end of this week.

Д. We have completed our work
722. Choose the Tense of the Verb. We had finished our experiments before he came.

А. Past Perfect

Б. Present Continuous

В. Present Indefinite

Г. Passive Voice.

Д. Present Perfect
723. Find the form Perfect Passive Tense:

А. Have been + P11

Б. Have + P11

В. To be + P 11

Г. To be + P1

Д. To be + Infin.

724. Find the Tense which doesn't used in Passive Voice.