什么是連詞？
連詞：用來連接單詞、短語、句子的詞。
常見連詞及其用法：
①both … and… ： … 和…，兩者都，既……而又……
Both Sam and Tom are my brothers.山姆和湯姆都是我的兄弟。
②not only… but （also）…：不但…而且…
Not only she but also you can come to my house.不但她而且你也可以來我家。
Not only is he angry , but （also ) he is sad.他不但生氣，而且難過。
③as well as 同，和
I like this dress as well as that one.這件和那件裙子我一樣喜歡。
You as well as Mary must study.你和瑪麗都得學(xué)習(xí)。
④either …or…：或…或，不是，就是
Either you or he has to work.不是你就是她需要工作。
neither nor：既不…又不…，兩者都不……
Neither you nor she is wrong.你和他都沒錯。
⑤so… that / such …that：如此…以至于…
注：so是副詞，后面接形容詞或副詞。
such是形容詞，后面接名詞。
He is so clever that he always get good grades. = He is such a clever boy that he always get good grades.他是如此的聰明，以至于每次都得到好成績。
⑥no sooner… than = hardly… when：一…就
I had no sooner rang the bell than she opened the door. = I had hardly rang the bell when she opened the door.我一按鈴，她就開門了。
注：no sooner, hardly 放在句首，主謂須倒裝。
⑦as soon as一…就…
She began to cry as soon as her mother left. 他媽媽一走她就開始哭了。
⑧as long as= so long as：只要
I will love you as long as I live.只要我活著，就會一直愛你。
⑨in case+ 從句=in case of+ n. = if + 從句
In case it rains we should bring an umbrella. = We showed the bring an umbrella in case of rain. = If it rains, we should bring an umbrella.我們應(yīng)該帶把傘，以防下雨。
⑩as if = as though好像（從句用虛擬語氣）
She sings as if she were happy.她唱得好像很開心。
11.so far as：據(jù)……所知
So far as I know, she is from Japan.據(jù)我所知，他是從日本來的。
