如：Tom is reading books in his study .

　　3．現(xiàn)在進(jìn)行時(shí)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(xiàn)在進(jìn)行時(shí)的一般疑問句把be動(dòng)詞調(diào)到句首。

　　如：Tom is reading books in his study .

　　Is Tom reading books in his study ？

　　5．現(xiàn)在進(jìn)行時(shí)的特殊疑問的基本結(jié)構(gòu)為：疑問詞+一般疑問句?

　　（注意：當(dāng)劃線部分包含謂語動(dòng)詞時(shí)，用疑問詞代替劃線部分放到句首，原劃線處應(yīng)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(dòng)詞加ing的變化規(guī)則

　　1．一般情況下，直接加ing，如：cook-cooking

　　2．以不發(fā)音的e結(jié)尾，去e加ing，如：make-making, taste-tasting

　　3．如果末尾是輔音字母加一個(gè)元音字母和一個(gè)輔音字母，雙寫末尾的輔音字母，再加ing，如：run-running, stop-stopping