My sister doesn't like vegetables为什么用doesn't like?
作者&投稿:谢采 (若有异议请与网页底部的电邮联系)
like.因为虽然sister是第三人称,但是在动词like前已经有了助动词doesn't,所以like不需要再变三单了.
LUCY is not his sister,but lily is.
Mom didn't want the shirt,while lucy did.
都是用来代替前面的动词的,多读读就有语感了
1. 解答: 这句话属于一般现在时,主语是My sister,相当于第三人称单数的人称代词she。根据一般现在时的语法规则,当she作主语时,谓语动词应该采用第三人称单数形式。如果要将原句改为否定句,则必须用助动词does+ not(=doesn't),置于谓语动词前,而且要把谓语动词恢复为动词原形。
2. 语法: 一般现在时表示现阶段经常反复做的动作或者活动。一般现在时的句子谓语动词大多数采用动词原形形式。但是当he,she,it或者与这三个人称代词语法功能相当的名词作主语时,谓语动词采用三单形式,也就是动词词尾要加s或者es。动词由原形变为三单形式,其规则主要有以下三条: ① 一般动词直接在词尾加s,比如sings,dances,plays。② 以s,ss,sh,ch,x,o结尾的动词词尾加es。比如 teaches,glasses,goes,brushes,fixes等等。③ 以“辅音+y”结尾的动词先变y为i,然后加es。比如carries,varies等等。
3. 例句:
① I get up very early every morning. 我每天起床都很早。(谓语动词用原形)
② Mary's mother always goes to the park at weekends. 玛丽的妈妈总是在周末去公园。(谓语动词使用三单形式)
My sister doesn't like vegetables.
我姐姐不喜欢蔬菜。
行为动词作谓语于一般现在时态主语是第三人称单数,变否定句要加入助动词doesn't
这里是说的英语里的主谓一致,主语是单数,谓语也用单数,这里my sister 是单数,否定式用oesn't.与后面的宾语vegetables.没有关系,
因为My sister是第三人称单数,所以否定句用does+not+动词原形
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