You should do what you could______(improve)your English.是用to improve 还是improve?

问题描述:

You should do what you could______(improve)your English.
是用to improve 还是improve?

答案是improve
could后面直接加动词原型

应该填to improve,此处是动词不定式作目的状语。不懂再问,希望能帮到你。

to improve,
词句有省略完整的句子应该是You should do what you could do to improve your English.
do被省略了.