1.It is the first time I have read this kind of book.
2.This is the most interesting novel I have read.
3.She has begun to work as a secretary since 2005.
4.The last time he saw his sister was since she left for Japan.
5.How long have Helen and Robert been married ?
6.It is two months since my family moved to Ho Chi Minh city.
7.When you phone me, I was having lunch.
8.I've started working for the company for 3 years.
9.When we arrived, David had gone home.
10.While I was having dinner, the phone rang.
11.The last time I was to the cinema was two months ago.
12.This is the first time I have problems with this computer.
13.They have never drunk any coffee for 3 days.
14.I haven't seen Aunt Jenny since i was fifteen.
15.When I got to the party, everyone was chatting and eating.