workhardat/in...的意思都是（努力学习...）什么时候用at?什么时候用in?最好带例子.

Question

work hard at/in...的意思都是 （努力学习...） 什么时候用at?什么时候用in?最好带例子.

Answer 1

可以这样认为,work hard at sth是努力学习/钻研/工作 某事,at 后接宾语,表对象、eg:they worked hard at building the buildings. 而work hard in 后接状语,可以是地点,时间…… eg:I never think i will stop working hard in the future. I will work hard in my office.. PS：work in 有 “插进, 引进, 配合”的意思.如果要表达“努力做某事”,还是用work hard at .