我老分不清 doesn't isn't ,例如he doesn't apologize for我老分不清 doesn't isn't ,例如he doesn't apologize for being late我填成isn't, 有什么语法关系吗

我老分不清 doesn't isn't ,例如he doesn't apologize for
我老分不清 doesn't isn't ,例如he doesn't apologize for being late我填成isn't, 有什么语法关系吗

当后面有动词时是doesnot,后面是形容词名词时写isnot

isn't后一般跟形容词，doesn't后加行为动词原形！

后跟动词是doesn't.后跟形容词和名词是isn't....