1.He is intelligent but he can't solve this math problem =>Intelligent 2.if he doesn't learn hard,he can't pass the final examination => Unless 3.he enjoys listening to music after a hard working day (Interested) ---> 4.mary's sister doesn't speak english as well as her (better) ---> 5people say he is a great teacher(said) --->

`Answer :` 

`1.` Intelligent as he is , he can't solve this math problem 

`->` Sử dụng mệnh đề tính từ đảo ngữ

`->` Đảo ngữ với tính từ : Adj `+` as `+` S `+` be, S `+` V 

`2.` Unless he learns hard , he can't pass the final examination 

`->` Unless `=` If not

`-` Cấu trúc unless điều kiện loại `1` :

`->` Unless `+` S `+` V-inf, S `+` will/can/shall `+` V-inf

`3.` He is interested in listening to music after a hard working day .

`->` Be interested in `+` V-ing : thích cái gì...

`4.` Mary speaks English better than her sister (does)

`-` Cấu trúc so sánh hơn với tính từ và trạng từ ngắn 

`->` S `+` V `+` (Adj/Adv) `+` “-er” `+` than

`5.` He is said to be a great teacher

`-` Chủ động : S`1` `+` V`1` `+` that `+` S`2` `+` V`2`

`-` Bị động : 

`->` It is `+` V1-pII `+` that `+` S`2` `+` V`2`

`->` S`2` `+` is/am/are `+` V`1`-pII `+` to `+` V`2` (nguyên thể)