she works hard at it

she works hard at it
为什么用at?用in for to?为什么不行?

yuan23569140 1年前已收到4个回答举报

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wcolorofwind 春芽

共回答了13个问题采纳率：92.3% 举报

work hard at...是个固定词组,意思是“努力学习……”.
He works hards at English.

1年前

6

xinhong5201314 幼苗

共回答了4个问题举报

固定搭配，work at是致力于

1年前

2

水水水蓝幼苗

共回答了613个问题举报

at ……

强调在某方面

be good at ……

在某方面擅长

1年前

1

lyhpfigo 幼苗

共回答了5个问题举报

固定搭配

1年前

1

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