()Your sister ______ round face.1.don't have 2.doesn't have 3.doesn't has顺便说明为什么
问题描述：
()Your sister ______ round face.1.don't have 2.doesn't have 3.doesn't has
顺便说明为什么
答
2 主语单三，用does，所以后面的动词用原形have
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答
2，your sister，显然是第三人称，本来要用has ，但是否定的时候已经把谓语动词第三人称转移到does上了，所以has 要变回have，doesn't have=hasn't
答
2.doesn't have
肯定句的时候用have的三单形式has,否定句的时候应加助动词don't或三单形式doesn't, 因为句子前面已经使用了三单形式doesn't，所以have就变成动词原形。
答
don't have
答
2.doesn't have
主语第三人称单数,同时,have拥有,实意动词否定助动词提前.