`11.` I last wrote to you a month ago.
- S + last + V2/V-ed + ....
`12`. I started to live in Hue when i was an eleven years old girl.
- S + started/began/finished + V-ing/To V + ...
`13.` He last saw her twelve years ago.
- S + last + V2/V-ed + ....
`14. `How long ago did you learn French?
- How long + have + has + S + VpII/V-ed + ...?
`15.` How long have you started to listen to music?
- How long + have + has + S + VpII/V-ed + ...?