i think mary is going to wear jeans to the party if she --- the teacher will not let her in 中----

题目

i think mary is going to wear jeans to the party if she --- the teacher will not let her in 中----
里填does 还是is 为什么?

答案

这是因为,助动词表强调针对的是行为,而wear jeans 才是,主语是she ,用does !