`11.` While we were having the middle of the film, the light went out.
- Thì QKTD
- While + S + was/were + V-ing + ...,S + V2/V-ed + ...
`12.` After she had come to my house, she had dinner together.
- Before we had dinner together, she had come to my house.
- After + S + had + VpII + ...,S + V2/V-ed + ...
- Before + S + V2/V-ed + ...,S + had + VpII + ....
`13.` It is ages since I last went to an Indian restaurant.
- It's + time + since + S + last + V2/V-ed + ....
`->` S + haven't/hasn't + VpII + ... + for + time
`14.` Peter has writted novels for two years.
- S + started/began/finished + to V/V-ing + ... + time
`->` S + have/has + VpII + ... + for + time
`15.` The last time I had a Chinese meal was 4 years ago.
- The last time + S + V2/V-ed + ... + was + time + ago
`->` S + haven't/hasn't + VpII + ... + for + time
