do well in后面加动词的ing形式，即动名词形式。因为"in"是介词，介词后面需要跟名词、动名词或者代词，所以不能直接跟动词原形，需要将其变为动名词形式，即加ing。

do

do well i的意思是“在…成绩好；在…做得好；在…表现好”，in后面要接动名词形式，即动词的ing形式。

常见句型

Some of us do well in swimming.

我们中有些人擅长游泳。

I do well in playing computer games.

我擅长电脑游戏。

He will do well in that work because he has a lot on the ball.

他会做好这件事，因为他很有一手。

do

To do well in your exams this year, turn off the TV, silence your mobile, and review your work regularly.

要想在今年的`考试中取得好成绩，关掉电视，把手机调成静音，定期复习功课。

She should do well in her studies this year—she's very focused.

今年她的功课应该学得好，她的注意力很集中。

You have to be highly competitive to do well in sport these days.

如今你必须有强烈的竞争意识才能在体育运动中取得好成绩。