英语知识点
行为动词的变化。
肯定句：主语+动词原形(+其它)。
否定句：主语+ don't( doesn't ) +动词原形(+其它)。
如：I like bread. I don't like bread.
当主语为第三人称单数时，要用doesn't构成否定句。
如：He ofter plays football.
He doesn't often play football.
一般疑问句：Do( Does ) +主语+动词原形+其它。(句首加助动词do, does)
如：I often play football.
- Do you often play football?
- Yes, I do. / No, I don't.
当主语为第三人称单数时，要用does构成一般疑问句。
如：She goes to school by bike.
- Does she go to school by bike?
- Yes, she does. / No, she doesn't.
特殊疑问句：疑问词+一般疑问句。
如：She goes to school by bike.
Does she go to school by bike?
How does she go to school?
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