`36` If it doesn't rain tomorrow I will go camping my friends .
`->` Câu đk loại 1
If + HTD, TLD
`37 `If I met ailen from outer space I would invite their home and talk .
`->` Câu đk loại 2
If + S+ ved / V2+..., S+ would /could+ V ....
38. I have never travelled by air .
`->` S+ have / has + never + Vpp+ ....
39. The students are studying for the exam now .
`->` Thì HTTD
40. It was such a cold day that we decided not go out
`->` It+ tobe + such+....+ that + ....: Quá dến nỗi mà .