1.Mary rang hours and hours ago.

→→ It it hours since Mary rang.

2.It is ages since Alan visited his parents.

→→ Alan last visited his parents ages ago.

3.John has not had his hair cut for over six months.

→→ It is It is over six months since John had his hair cut.

4. I has never seen such a beautiful building.

→→ It's the most beautiful building I have seen.

5.I have never read such a roman story.

→→ This is the most roman story I have read.

6. They had never had such a cold winter.

→→ It was the coldest winter they had had.

7.You will never meet anyone more dangerous than Mrs Jones.

→→ Mr. Jones is the most dangerous person you will met.

8.Man has never had such efficient servants as computer.

→→ Computer is the most effecient servants Man has had.

9. I haven't played football since 2000.

→→ The last time I played football was in 2000.

10. I haven't been to HCM city for 2 years.

→→ The last time I have been to HCM city was 2 years ago.