1.That is the worst film i have ever seen in the cinema.

       THIS/THAT IS THE +ADJ EST /MOST +ADJ +S+HAVE/HAS+EVER+V(PII)+O+..

2 We last saw Mary when we left the university

        Lần cuối cùng làm việc gì đó khi...= Không làm việc gì đó từ khi.

S+last+V-ed+when+S2+V-ed=S+have/has(not) +PII +since+S2+V-ed

3.It has rained for an hour.

 S+STARTED/BEGAN+TO-V/V-ING +KHOẢNG T/GIAN TRONG QK

=S+HAVE/HAS+PII+FOR /SINCE+TIME

4.The last time we visited my grandfather was two months  ago

THE LAST TIME +S+V-ED+....+WAS+KHOẢNG THỜI GIAN

=S+HAVEN'T/HASN'T+PII+....+FOR/SINCE+T/GIAN

5 it's nearly five years since my brother last saw his bestfriend

IT'S TIME+SINCE+S+LAST=V-ED+...

=S+HAVEN'T/HASN'T+PII+...+FOR/SINCE+TIME

6.This is the first time i have eaten this kind food 

THE FIRST TIME +S+HAVE/HAS+PII....

=S+HAVE/HAS +NEVER+PII.........BEFORE