第三人称单数动词加s,如果前面有don't的话,还要不要加s?

如题所述

不加,前面有助动词就不加:如 do don't does doesn't did didn't
还有情态动词也不加,如:need、can ,should追问

肯定句也一样吗

追答

是滴,无论是什么句型,这条法则不变

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