即be+现在分词(doing)
动词现在分词的构成
(1)直接在动词尾+ing
playplaying readreading eateating
(2)以不发音的字母e结尾的动词,失去e再加ing
skateskating taketaking dancedancing
(3)以重读闭音节结尾的动词,且词尾只有一个辅音字母,应双写其辅音字母再加ing。
beginbeginning cutcutting putputting
shopshopping runrunning swimswimming getgetting
sitsitting
趁热打铁
go look write moke
get sit ask close
put eat seim run
sleep like see give
3、句式构成
(1)肯定句:主语+be+现在分词+其他
I am doing my homework
eg:①He is reading a book
②They (look)for a little girl.
(2)否定句:主语+be+not+现在分词+其他
He isnt watching TV.
I am not cooking
eg:①Tom (play)the guitar now.
②I (do)sports at the moment.
(3)一般疑问句:Be+主语+现在分词+其他?
注:答语(1)肯:yes, 主语+be (2)否:No,主语+be+bot
Are you dancing? Yes I am
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