表示因果关系
because, because of, since, now that, as, thanks to…, due to…, therefore, as a result (of), otherwise, so…that, such…that
表示条件关系
as (so) long as, on condition that, if, unless
表示让步关系
though, although, as, even if, even though, whether …or…, however, whoever,
whatever, whichever, wherever, whenever, no matter how (who, what, which, where, when, whom)
表示举例
for example, for instance, such as…, take… for example
表示比较
be similar to, similarly, the same as, in contrast, compared with (to)…just like, just as,
表示目的
for this reason,, for this purpose, so that, in order to, so as to,
表示强调
in deed, in fact, surely, certainly, no doubt, without any doubt, truly,
obviously, above all,
表示概括归纳
in a word, in short, in brief, on the whole, generally speaking, in my opinion, as far as I know,
As we all know, as has been stated, as I have shown, finally, at last, in summary, in conclusion,
（三）掌握常用句型：
台湾英语资源网 http://www.esl.tw 里面有很多，下面只列举比较常用的。
1. in order to
为了实现他的梦想，他学习非常努力。
He worked very hard in order to realize his dream.
2. in order that
她拼命干活以便到六点时把一切都准备就绪。
She worked hard in order that everything would be ready by 6 o’clock..
3. so…that
他们太累了，除了伸懒腰什么都做不了了。
They were all so tired that they could do nothing but yawn.
4. such…that
天气非常冷，以致于街上一个人都没有。
It was such a cold day that there was nobody on the street.
5. would rather do…than do
他宁愿听他人讲而不愿自己说。
He would rather listen to others than talk himself.