my mother likes tea改为否定句
否定句:my mother does not like tea.我妈妈不喜欢茶。句中有实义动词,所以要借助助动词才能变成否定句。
否定词的变化原则
1、be动词的否定式
be 动词根据不同的人称和时态有不同的形式,在一般现在时中是am , is , are可用作联系动词,构成否定式时,一律在其后面加否定词not。
如:He is reading. --- He is not reading.
2、 情态动词的否定式
情态动词的否定式是在其后面直接加not。
如:I can swim. --- I can’t swim. He can dance.
3、实义动词的否定句
实义动词变否定句时,要借助助动词do , does,在一般现在时中用do或者does其句子结构为:主语+ don’t / doesn’t + 动词原形+其它。
如:(1)I like pop music. --- I don’t like pop music.
(2) She does her homework at home. --- She doesn’t do her homework at home.
my mother doesn’t like tea。实义动词变否定句时,要借助助动词do , does,在一般现在时中用do或者does其句子结构为:主语+don’t / doesn’t +动词原形+其它。
例如:
I like pop music. --- I don’t like pop music.
He likes running. --- He doesn’t like running.
doesn't和don't区别
一、单复数不同
don't是do的复数否定形式。
doesn't是do的第三人称单数否定形式。
二、用法不同
don't用法:do用来构成一般现在时和一般过去时的疑问或否定式。
例句:Don't argue with me.
别和我争辩。
doesn't用法:doesn't是do的第三人称单数否定形式,其后要跟原形动词。
例句:It doesn't matter to me whether you go or not.
你去或不去,对我都没关系。