1.As:when/since/as…as…/I know some of the family secrets ，young as I am.(让步)/Do as I do(壮从)/Tom is unusually tall，as are his brothers，(倒装)/To shut your eyes to facts， as many of you do，is foolish.(定语从句)/as for=as to至于(句首)/as much=so/as long as：只要/=while/as such：确切而言

2.Unless

3.Until

4.Before

5.Because

6.Either

7.So

8.Nor

9.Never

10.For

11.Since

12.If

13.Between

14.After

15.Only if

16.Lest 子句为should+V

17.Although/while/when

18.Now that

19.If only :If only she would marry me ! (常表示愿望或未实现的条件,尤用于感叹句)

20.Provided that

21.So that

22.Even if

23.Neither

24.Each

25.Who

26.Which

27.What: what if: what if the rumor is true?(万一……怎么办)

What though: what though we are poor, we still have each other.(既使……又有什么关系)

28.Except/aside from/other than :except for+N/except that…

29.Or:or else=otherwise

30.But

EX: I never go past my old school but I think of Mr merry,the head-master.

31.That

32.In that

33.Such that

34.As if/as though: He looks as if he had seen a ghost.(子句用过去时)

35.Where

36.How: He told me how he had read about it in the newspaper.(=that )(引导间接引语)

37.Supposing /if

38.Whereas/on the other hand/while

39.But for /but that/ except for

40.While:While I admit that the problems are difficult, I don’t agree that they can not be solved.(=although)

41.When:since/although

42.Nevertheless/nonetheless

43.Only:The book is likely to be useful, only it is rather expensive(=however)

He would probably do well in the exam, only that he gets rather nervous(=but that)