 | 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) | 
