`1` Weren't you to back out your think , you would not be welcome to join us .

`-` Đảo ngữ điều kiện loại `2` .

`@` Were + S + to V + O , S + would/could + V-inf + O .

`2` I can't make head nor tail of this document .

`-` understand one word `=` make head nor tail : không hiểu được bất cứ thứ gì .

`3` They left early in order not to get caught in the traffic .

`-` Cụm từ chỉ mục đích .

`@` Clause `1` + in orde to/so as to + V + O .

`4` The time I had was too short to visit the town properly .

`-` S + be + too + adj + to V + O : Ai đó quá như thế nào để làm gì .

`5` It is essential for you to be on time for the interview .

`-` It's essential for sb to do sth : Ai đó cần thiết phải làm gì .