5 =>If they understand the problem,they will find a solution
_ Câu điều kiện loại 1 : If + S + V(s/es), S + will + V
7=> If Carol hadn't been studying, she would have answered the phone.
8 => If Rita had got sleep last night, she wouldn't be exhausted today.
_ Các câu 7,8 thuộc câu điều kiện loại 3 :
_ If + S + had + PII, S + would + have + PII
9 => If she weren't very thin, she wouldn't feel cold so much.
10 => If he polished his shoes, he would look smart.
_ Các câu 9,10 thuộc câu điều kiện loại 2 :
_ IF + S + Ved/cột 2 , S + Would + V