英語知識點
行為動詞的變化。
肯定句：主語+動詞原形(+其它)。
否定句：主語+ don't( doesn't ) +動詞原形(+其它)。
如：I like bread. I don't like bread.
當主語為第三人稱單數時，要用doesn't構成否定句。
如：He ofter plays football.
He doesn't often play football.
一般疑問句：Do( Does ) +主語+動詞原形+其它。(句首加助動詞do, does)
如：I often play football.
- Do you often play football?
- Yes, I do. / No, I don't.
當主語為第三人稱單數時，要用does構成一般疑問句。
如：She goes to school by bike.
- Does she go to school by bike?
- Yes, she does. / No, she doesn't.
特殊疑問句：疑問詞+一般疑問句。
如：She goes to school by bike.
Does she go to school by bike?
How does she go to school?
動詞+s的變化規則
1.一般情況下，直接加-s，如：cook-cooks, milk-milks
2.以s. x. sh. ch. o結尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes
3.以“輔音字母+y”結尾，變y為i, 再加-es，如：study-studies
現在進行時
1.現在進行時表示現在正在進行或發生的動作，也可表示當前一段時間內的活動或現階段正在進行的動作。(句中一般含有now, look, listen.)
2.現在進行時的肯定句基本結構為be+動詞ing.
如：Tom is reading books in his study .
3.現在進行時的否定句在be后加not。
如：Tom is reading books in his study .
Tom is not reading books in his study .
4.現在進行時的一般疑問句把be動詞調到句首。
如：Tom is reading books in his study .
Is Tom reading books in his study ?
5.現在進行時的特殊疑問的基本結構為：疑問詞+一般疑問句?
(注意：當劃線部分包含謂語動詞時，用疑問詞代替劃線部分放到句首，原劃線處應加上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?
動詞加ing的變化規則
1.一般情況下，直接加ing，如：cook-cooking
2.以不發音的e結尾，去e加ing，如：make-making, taste-tasting
3.如果末尾是輔音字母加一個元音字母和一個輔音字母，雙寫末尾的輔音字母，再加ing，如：run-running, stop-stopping