在中文怎么说：what did he concentrate his efforts on?
In English we say:

"I concentrated my efforts on.... "

or

"John concentrated on..."

How do you ask the question of this in Chinese:

"Instead of thinking about what he couldn't do, What did John concentrate his efforts on?"

Question

在中文怎么说：what did he concentrate his efforts on?
In English we say:

"I concentrated my efforts on.... "

or

"John concentrated on..."

How do you ask the question of this in Chinese:

"Instead of thinking about what he couldn't do, What did John concentrate his efforts on?"

Answer

"Instead of thinking about what he couldn't do, What did John concentrate his efforts on?"——you can say 与其去想他不能做什么，还不如思考一下John可以把精力放在什么地方？

Answer

那  时候  他  在  什么  投入  心力？

Answer

just say “John把他的精力放在什么地方了？”