英语中动词是什么？怎么用？

动词在英语中可以做谓语，表示主语行为的发生。
动词+s的变化规则
1．一般情况下，直接加-s，如：cook-cooks, milk-milks
2．以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes
3．以“辅音字母+y”结尾，变y为i, 再加-es，如：study-studies
现在进行时
1．现在进行时表示现在正在进行或发生的动作，也可表示当前一段时间内的活动或现阶段正在进行的动作。（句中一般含有now, look, listen.）
2．现在进行时的肯定句基本结构为be+动词ing.
如：Tom is reading books in his study .
3．现在进行时的否定句在be后加not。
如：Tom is reading books in his study .
Tom is not reading books in his study .
4．现在进行时的一般疑问句把be动词调到句首。
如：Tom is reading books in his study .
Is Tom reading books in his study ？
5．现在进行时的特殊疑问的基本结构为：疑问词+一般疑问句?
（注意：当划线部分包含谓语动词时，用疑问词代替划线部分放到句首，原划线处应加上doing）
如：Tom is reading books in his study . Tom is reading books in his study .
Is Tom reading books in his study ? Is Tom reading books in his study ?
What is Tom doing in his study? Where is Tom reading books?
动词加ing的变化规则
1．一般情况下，直接加ing，如：cook-cooking
2．以不发音的e结尾，去e加ing，如：make-making, taste-tasting
3．如果末尾是辅音字母加一个元音字母和一个辅音字母，双写末尾的辅音字母，再加ing，如：run-running, stop-stopping

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