在look good in词组前面一般为人,look good on一般为物。
例:look good in.
I want to look good in my new bathing suit.
我想穿新泳裤能好看些。
You would look good in that.
你穿上它一定很帅。
而look good on则相反,例:
It doesn't look good on him at all.
看起来一点都不好。
The plans look good on paper, but there is no guarantee that they will work.
这些计划写在纸上不错,但无法保证它们一定能行得通。