i'm worried about my english _______harder _______you willcatch uo with your classmates!

问题描述:

i'm worried about my english _______harder _______you willcatch uo with your classmates!
第一个空working 还是work?
为什么是work?语感告诉我是working...选work的理由是什么?

这是两句对话,第二句回应用的是祈使句型(见到感叹号就可判断啦)
i'm worried about my english.
Work harder and you will catch up with your classmates!什么时候用working??在当主词时可以用动名词 Working ,例如:Working hard is one way for you to catch up with your classmates.