1, This is the first time I have ever been to SaPa. 

 ->Cấu trúc: This is the first time S + have ever VpII.

2, I haven't seen him since 2010.

 ->Cấu trúc: S+ have/has not VpII +since+khoảng thời gian

                                                       +for+mốc thời gian

3, It's the most amazing sight she has ever seen.

 ->Cấu trúc: It's the most adj S+have/has ever VpII.

4, The weather in Sydney isn't as hot as the weather in Rio de Janeiro. 

 ->Cấu trúc: S1+to be(chia) as adj as+S2.

5, They have lived in New York since 2004.

  ->Cấu trúc: S+have/has VpII+ since+khoảng thời gian.

                                                   for+mốc thời gian.

6, The last time we went to Ha Noi was three years ago.

 ->Cấu trúc: The last time S+Vqkđ +was+thời gian+ago.

7, Big Ben is the most famous in England.

 ->Cấu trúc: S+to be(chia)+ the most+ adj dài.

                                          + adj ngắn+est

8, New York is more modern than London.

 ->Cấu trúc: S1+is/am/are+ more adj dài than+S2.

                           + adj ngắn+er+S2