一般现在时态中,主语是第三人称并是单数的第三人称时(如Sam,the cat,this pretty girl,he,she it),其后的动词就加s(wants,likes,enjoys)或者加es(watches,brushes,dresses),而have则是变为has;
如果变否定句,则借“助动词does”+not,助动词之后动词要还原为原形,所谓“有借有还,再借不难”。
如:He likes apples.
He does not like apples.
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