`6`. This is the first time I have eaten this kind of food.
`-` Cấu trúc : This is the first time + S + has/have PII
`7`. She is the most beautiful girl I have ever seen.
`-` Cô ấy là cô gái đẹp nhất tôi chưa từng thấy trước đây.
`-` The most beautiful girl : Cô gái đẹp nhất
`->` Cấu trúc ss hơn nhất : S + the most Adj + N
`8`. I have never read a better novel than this one before.
`-` Cấu trúc so sánh hơn : S + Adj(er ) + N
`9`. I haven't had my hair cut since October
`-` Cấu trúc : S + have/has ( not ) + V 
`10`. We haven't gone together for five months.
`-` Cấu trúc : S + have/has + PII + O
`11`. It is has been two years since I last went to Singapore
`-` Cấu trúc : It is + time since S + V(2/ed)
`#Q`

1. This is the first time I have eaten this kind of food.

2. She is the most beautiful girl I have ever seen.

3. I have never read such a good novel before

4. I haven't had my hair cut since October

5. We haven't gone together for five months

6. It is/has been two years since I last went to Singapore.

*Kiến thức :

_ S + last + Ved + time+ ago: Lần cuối cùng làm gì

=> S + have/ has +not+ for + time

=> It’s + time+ since + S + last + Ved.

=> The last time + S + V ed+ was + time + ago.

_ This is the first time + S +have/has+P2: Lần đầu làm gì

=> S +have/ has + never + P2+ before

_ This is the Superlative (...est/ most ADJ N) S +have/has+P2

=> S +have/ has + never + P2+ such a/an+ ADJ+ N