2019解放军文职招聘考试教育学英语知识点598
(2) 转折关系：but / yet / still / while / when
Tom was not there but his brother was ( there )
(3) 选择关系：or / either… or…
Either you didn’t understand this, or you were not careful enough.
(4) 因果关系：for / so
He hurried, for it was getting dark.
He liked the book very much, so I gave it to him.
2、there be结构
英语中“there + be + sb. /sth.+ 地点”结构表示“某处有某人或某物”。There是引导词，本身没有意思，be是谓语动词，be后面是主语，be必须和主语的数保持一致。如：
There is a garden behind the house.
There are two books on the desk.
如果主语部分是两个以上的并列主语时，be一般和邻近的主语的数保持一致。如：
There is a cup and two books on the desk.
There are five students and a teacher in the classroom.
3、复合句
复合句中包括两个或更多的分句，其中一个分句是主句，其余的分句是从句。从句就是一个分钟在主句中充当一个成分，如主语、表语、宾语、定语、状语等。从句在句子中作什么成分就叫什么从句。
1、主语从句
用作主语的从句叫作主语从句，主语从句一般都是作谓语动词的主语，偶尔也可以作分词的主语。
(1) 由what, that引导的主语从句
What she likes is watching the children play.
It is right that you told him the truth.
(2) 由连接副词whether, when, how, where, why引导主语从句。
Why the fire broke out at night remains a mystery.
Whether we can help you is a difficult question.
When the meeting will be held has not been decided
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