1. we have not seen her since Christmas day
2.this is the first time i have eaten this kind of food
3.it has rained for an hour
4.the last time we visited my grandfather was 2 months ago
5.i bagan studying english 3 years ago
6.its nearly 5 years since my bro saw his best friend
7.how long have u started learning english
8.we have lived here for 15 years
9.she has not visted me for 5 years
10..i have not written to my uncle since july