由that, so that…或such…that引导。

例如：It is such a difficult problem that nobody can work it out.

由so that… , in order that , lest , in case , for fear that 等引导的从句的谓语动词常与can , may , could , might , should 等情态动词连用。

例如：Take an umbrella in case it should rain.

Ask him to hurry up with these letters in order that I can sign them.

由连接词as…as、than、not so…as…等引导。

例如：He speaks English much better than any other student in his class.

由连接词if, as long as, on condition that , supposing 等引导。如果主句用一般将来时，从句应用一般现在时。

例如：As long as you keep on trying , you’ll certainly succeed.

We will let you use the room on condition that you keep it clean and tidy.

地点状语从句由where, wherever引导。

例如：Make a mark where you have any questions.

　　　 Where there is a will, there is a way.

由连接词when、while、before、after、since、until(till) 、as soon as、as等引导

例如：When it rains , the children will play indoors .

No sooner had I got home than it began to rain.

The moment the bell rang, all the students stood at attention.

41.　　 B　　 42.　　 C　　 43.　　 C　　 44.　　 D　　 45.　　 A　　 46.　　 B　　 47.　　 C　　 48.　　 C　　 49.　　 B　　 50.　　 B

31.　　 A　　 32.　　 B　　 33.　　 C　　 34.　　 B　　 35.　　 A　　 36.　　 A　　 37.　　 A　　 38.　　 A　　 39.　　 B　　 40.　　 C

21.　　 C　　 22.　　 A　　 23.　　 C　　 24.　　 B　　 25.　　 A　　 26.　　 D　　 27.　　 A　　 28.　　 A　　 29.　　 B　　 30.　　 A

11.　　 D　　 12.　　 A　　 13.　　 C　　 14.　　 B　　 15.　　 B　　 16.　　 D　　 17.　　 B　　 18.　　 A　　 19.　　 A　　 20.　　 C