i did (that/what) i could (help/to help) others.这两个怎么选/为什么?

问题描述:

i did (that/what) i could (help/to help) others.这两个怎么选/为什么?

I did what I could to help others.
what I could在这里做宾语,to help others是宾补

I did (what I could) to help others .
前面的what 引导I could
后面的 to help 表目的