誉德教育英语小课堂：
连词是一种虚词，不能在句子中单独作句子成分，也没有句子重音，在句子中只起连接词与词、短语与短语、句子与句子以及从句的作用。连词分为并列连词和从属连词两种。并列连词是连接彼此并列关系的词。从属连词是用来引导从句的词。
二、并列连词
并列连词用来连接具有并列关系的词、短语或句子。并列连词按其作用可分为表示转折、因果、选择和联合关系等四大类。
表示联合关系的连词，常见的有：and, not only……but also, as well as, both…and, neither…nor….
written english is more or less the same in both britain and american.
they were very surprised and i knew that i had done the right thing.
work hard and you’ll pass the exam
=if you work hard, you’ll pass the exam.
while i was in the university, i learned both english and japanese.
both european and asian speak russia
you can’t speak both american english and british english at the same time.
neither tom nor you are a driver.
neither i nor he has seen the play.
neither of us is a teacher
you don’t like it, neither do i .
she is beautiful as well as clever.
he is a great writer as well as a famous doctor.
三、从属连词
从属连词是用来连接各种从句的词
1、连接主语从句、表语从句与宾语从句的连词只有三个，即that, if, whether。如：
ask her if she will come with me.
the reason is that she never wasted her time.
i don’t know whether he had passed the exam.
2、引导状语从句的从属连词
(1) 连接时间状语从句的从属连词有：since, until, after, before, when, while, as soon as, whenever.
i’ll tell you as soon as i know.
(2) 连接地点状语从句的从属连词有: where, wherever
sit wherever you like.
i found my books where i had left them.
(3) 连接让步状语从句的从属连词有：although, though, even if, however.
although she was tired, she kept on working.
(4) 连接原因状语从句的从属连词有：as, because, since, now that,
he was absent because he was ill.
(5) 连接目的状语从句的从属连词有：that, so that, in order that.
he raised his voice so that we could hear him.
(6) 连接条件状语从句的从属连词有：if, unless, once, in case.
you’ll miss the train unless you hurry up.
(7) 连接结果状语从句的从属连词有：so…that, such…that.
he came so late that he missed the class.
(8) 连接比较状语从句的从属连词有：as…as…, not so…as…, less(more)…than, the …the…
this is more than i can accept.
(9) 连接方式状语从句的从属连词有：as, as if
it looks as if it was going to rain.
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