isn't，doesn't，don't分别用在哪里？怎么用？？求救！

来源：百度知道 编辑：UC知道 时间：2024/09/21 11:18:51
在填空时经常不知道要添哪一个..什么时态，人称用哪个..定义例子都要啊...满意会追加高分的！！一定要帮助啦...

isn't和doesn't用在第三人称单数后，don't用在第一、二人称后。isn't后为名词、形容词，don't和doesn't后为动词。

isn't 后面是名词。doesn't后面是动词。
don't后面是动词

isn't和doesn't用在第三人称单数后(It isn't your fault这不是你的错; He doesn't like her他不喜欢她 )，don't用在第一、二人称后（I don't think so 我不认为是这样；You don't have to do sth.你没有必要做某事）。isn't后为名词、形容词，don't和doesn't后为动词原形。