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英语语法基础
一、词性
1. 名词(noun →n.)：
表示人或物的名称，man, teacher, book, music, time等。
另有专有名词如Tom, New York, Wall Street, ATM等。
动名词也是名词，由动词+ing构成，表示某种行为，如：swimming, playing basketball, being short等。
在英语中，名词可做句子的主语、宾语、表语、定语、补足语、同位语。如：
I love studying English in my leisure / spare / free time. （主语、宾语）Being short is not a disadvantage. （主语、表语）
The railway bridge is to be reconstructed next month. （定语）
We made him monitor. （宾语补足语）
We Chinese people mean what we say. （同位语）
2. 各种代词(pronoun →pron.)
指代人或物，如人称代词he, she, us, them, 指示代词this, that, these, 不定代词some, any, someone, something, all, each，疑问代词what, which等。
代词类似于名词，在英语中通常做主语、宾语，少数可以做表语、同位语、定语。
What has happened to him? （主语、宾语）
This is my book. Yours is over there. （定语、主语）
They each / all got a birthday present. （同位语。当然，还有主语they 也是代词。）
注意：反身代词只能作宾语、表语、同位语，绝对不能做主语! 例如：He himself is to blame for the mistake. （同位语）
He isn’t himself / doesn’t look / feel / seem himself today. （表语）
He slipped, but didn’t hurt himself. （宾语）
3. 形容词(adjective →adj./a.)
形容词的主要功能就是作定语、表语、补足语。如：
He is said to be a handsome boy. （定语）
He is tall, handsome, and above all, very intelligent. （表语）
He fell down to the ground, dead. （主语补足语）
4. 副词(adverbial →adv./ad.)
副词通常做状语，修饰动词、形容词、另外一个副词、整个句子。He plays the piano well / very well. （修饰动词短语plays the piano，very又修饰副词well）
She is very / really / pretty beautiful. （修饰形容词beautiful）Surprisingly, he passed the exam at first attempt. （修饰整个句子）
注意一词多义、一词多性现象：
She was very ill and was rushed to hospital immediately. （形容词，“生病的”，句中作表语）
ill effects / discipline / temper / humor（形容词，“不好的；糟糕的；有害的”，只能作前置定语）
ill-equipped / ill-treat / speak ill of sb （副词，“坏地；糟糕地”，做状语）
a cure for all the nation’s ills（名词，“问题；困难”，作宾语。）
The book is very good and worth reading a second time. （程度副词，“非常地”，做状语。）
He is the very man for the job. （形容词，“恰恰是；正是”等表示强调的意思，只能做前置定语。）
He played the instrument so well that he won first prize. （副词，“好地”）He’ll get well soon. （形容词，“身体好的；健康的”，只能作表语。）We used to get our water from a well. （名词，“井；水井；油井；气井）With tears well ing in his eyes, she went away. （动词，“（液体）流出；涌出”）
5. 介词(preposition →prep.)
英语中的介词不能单独使用，通常跟后面的宾语构成介词短语，一起做句子的状语、定语、表语、补足语。
I’ll put my name on the back of the envelope. （地点状语）
She didn’t remember the name on the back of the envelope. （后置定语）He was on holiday at the time. （表语、时间状语）
He left his keys in the dormitory. （宾语补足语）
6. 连词(conjunction →conj.)
英语中的连词有并列连词和从属连词两种，分别引导并列句和从句。并列连词主要有and, but, or, so, for；从属连词引导从句，按功能分有
