1,I last wrote to you a month ago
-->I haven't
2,The last time I saw Tony was in 1986
-->I haven't
3,It's nearly 20 years since my father met her
-->My father hasn't
4,He last saw her two weeks ago
-->He hasn't
5,The last time she went out with him was 9 months ago
--->SHE hasn't
6,It's two months since I was last in Ha Noi
--->I haven't
1,I last wrote to you a month ago
-->I haven't written to you for a month
2,The last time I saw Tony was in 1986
-->I haven't seen Tony since 1986
3,It's nearly 20 years since my father met her
-->My father hasn't met her for nearly 20 years
4,He last saw her two weeks ago
-->He hasn't seen her for 2 weeks
5,The last time she went out with him was 9 months ago
--->SHE hasn't gone out with him for 9 months
6,It's two months since I was last in Ha Noi
--->I haven't been in Ha Noi for two months
1, I haven't written to you for a month
2, I haven't seen Tony since 1986
3, My father hasn't met her for nearly 20 years
4,He hasn't seen her for 2 weeks
5, She hasn't gone out with him for 9 months
6, I haven't been in Ha Noi for two months