1. The students are in the reading hall.
The students were in the reading hall.
The students will be in the reading hall.
2. I am glad to meet my friend.
I was glad to meet my friend.
I will be glad to meet my friend.
3. He is eighteen.
He was eighteen.
He will be eighteen.
4. My friend is preparing to enter the University.
My friend prepared to enter the University.
My friend will prepare to enter the University.
5. Such problems are discussed at our meeting.
Such problems were discussed at our meeting.
Such problems will be discussed at our meeting.
6. The train is to arrive at 10.
The train was to arrive at 10.
The train will be to arrive at 10.
7. My friend is a doctor.
My friend was a doctor.
My friend will be a doctor.
8. They are in Moscow.
They were in Moscow.
They will be in Moscow.
9. The book is translated into English.
The book was translated into English.
The book will be translated into English.
10. Pete is waiting for you.
Pete waited for you.
Pete will wait for you.
Объяснение:
