连词
连词可分为：并列连词、从属连词。
并列连词
并列连词用于表示：并列关系、转折关系、因果关系。
并列关系
1、and/or 和/或
and表示“和”，谓语动词要用复数；or表示“或”，谓语动词用单数
You and/or your brother will go with me. 你和/或你的兄弟将要跟我一起走。
Lucy and Jack are my good friends. 露西和杰克是我的好朋友。
Milk or coffee is Ok. 牛奶和咖啡都可以。
2、either...or... 要么...要么...
谓语动词采用就近原则
Either you or your brother will go with me. 要么你要么你兄弟将要跟我一起走。
Either Jack or I am right. 要么杰克要么我是对的。
3、neither...nor... 两个都不...
谓语动词采用就近原则
Neither you nor your brother will go with me. 你和你兄都不会跟我一起走。
Neither I nor she dose the right thing. 我和他都没有做正确的事情
4、both...and... 两者都...
和and类似，谓语动词用复数。
Both you and your brother will go with me. 你和你兄弟都会跟我一起走。
Both Jack and Tom can play basketball. 杰克和汤姆都能打篮球。
5、not only...but also... 不但...而且...
谓语动词采用就近原则
Not only you but also your brother will go with me. 不但你而且你兄弟也会跟我一起走。
Not only the children bus also their mother likes the movie. 不仅这些孩子们而且他们的妈妈都喜欢这部电影。
6、as well as 以及
谓语动词采用就远原则
Mike can speak Chinese as well as English. Mike能讲汉语已经英语。
The mother as well as her children likes the movie. 这位母亲已经孩子们都喜欢这部电影。
转折关系
1、but/yet 但是，然而
I went to the new restaurant yesterday , but/yet it closed. 我昨天去了那家新开的饭店，但是却关门了。
2、although 虽然，尽管
I walked to school , although it was raining. 我步行上学，虽然正在下雨。
说明：but和although不能再同一个句子里使用，两者只能选其一。
因果关系
1、so 所以
The child was ill, so his mother took him to the doctor. 这歌孩子病了，所以他的妈妈带她去看医生。
2、because/since/as/for 因为
The days are short, because/since/as/for it is now December. 白天很短，因为现在是十二月。
从属连词
从属连词用于连接从句。
1、主语从句
That he loves the girl is obvious to everyone. 他爱那个女孩对每个人是明显的。
that引导主语从句
2、宾语从句
He wants to know whether/if they can help him.. 他想知道是否他们能帮他。
whether/if引导宾语从句
3、状语从句
We've never met since we graduated from the college. 自从我们大学毕业就没有再见面。
since引导时间状语从句
You can go wherever you like these days. 这几天无论哪里你喜欢你都可以去。
wherever“无论哪里”引导地点状语从句
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