一。改为否定句:
类型1 在动词 is, am, are (或was, were )后面加上 not ,其它不变。
在动词can, could, will(将要), would(愿意), should(应该), 或 must(必须)、may(可以)后面加上 not,就可以改为否定句。
类型2 普通动词,需要加上助动词do 或does或did, 再加上 not, 动词用原形,就可以改为否定句。
例:we like tea.→→we do not like tea.(即we don’t like tea.)
he wants two cakes. →he does not want two cakes.
they lived in guilin. →they did not live in guilin.
二、动词用法:
1、is, am, are后面动词用ing形式(现在分词),表示正在进行某活动。
2、do 或does或did, can, could, will(将要), would, should(应该), 或 must(必须)后面的动词用原形,也就是动词不要变。
3、to后面动词用原形,例如短语用法: go to do, want to do,
be going to do, would like to do,
4、特殊短语用法:例:go swimming, go fishing, go shopping
5、动词ing形式当动名词用,例:like running,6. 介词(for,at,in,on,with等)后面动词用动词ing形式当动名词用,例:
thank you for talking to me. thank you for helping me.
she is good at singing songs.
7. she, he,等第三人称单数后面,动词用第三人称单数形式,例:daming likes milk. tom watches tv every day.
8. 有 ago, yesterday, last week等过去时间,动词用过去式形式。
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