grammar

1. At that time, Julia was working in a hospital in London.
2. I knew that on a previous occasion I had gone to collect the paper from the office.
3. I wonder what we would be doing twenty years from now!
4. My grand father hadn't have enough exercise since his last operation.
5. This month I'm going to work at home, this is what they call flexi-time.
2.) Identify and correct the mistake and explain the correction:
1. I 'VE BEEN WORKING at University for ten years now.
2. " Have you read a book called "Waiting for Anyia?" "Who WROTE it?"
3. We'D (HAD) been staying with Paul and Jerry until last week.
4. I HAVE KNOWN Helen for a number of years.
5. can i borrow your camera? I'll GIVE it back to you tomorrow.

. Supply the suitable form of the verbs in the following examples:
1. At that time, Julia was working in a hospital in London.
2. I knew that on a previous occasion I had gone to collect the paper from the office.
3. I wonder what we will have been doing twenty years from now!
4. My grand father hasn’t had enough exercise since his last operation.
5. This month I am working at home, this is what they call flexi-time.

2. Identify and correct the mistake and explain the correction:
1. I have been working at University for ten years now.( Present Perfect Continuous- 10 лет)
2. " Have you read a book called "Waiting for Anyia?" "Who wrote it?" (Past Simple)
3. We had been staying with Paul and Jerry until last week.(Past Perfect Cpntinuous)
4. I have (had) known Helen for a number of years.(Present/Past Perfect)
5. Can i borrow your camera? I'll give it back to you tomorrow.(Future Simple0

1 is working
2 was going/should go
3 will have done
4 hadn't have
5 work

1have been working
2Anya....Who was it written by?
3 till last week
4 have known
5 I ...Will give