47Despite his broken legs he was able to get out of the car before it exploded

-> sau despite phải là 1 danh từ hoặc 1 cụm danh từ

48 i haven't eaten this kind of food before

-> Ta có cấu trúc : This is the first time + thì HTHT 

49 those plants were bult 20 years ago 

-> thì QKĐ 

50  You don't need to phone her 

-> thì HTĐ , diễn tả sự thật

`47.` Despite his broken leg, he managed to get out of the car before it explored.

Despite/ In spite of + V-ing/ N/ N/ Phrases, S + V

`48.` I haven't eaten this kind of food before.

Cấu trúc: this/ it is the first time + S + has/ have + VptII.

= S + has/ have + not + VptII + before.

`49.` Those plants were built 20 years ago.

Ago: thì quá khứ đơn

`->` Câu bị động thì quá khứ đơn: S + was/ were + VptII

`50.` You don't need to/ have to phone her.

Be not necessary: không cần thiết

= Not need to/ have to: không cần/ không phải