what :单独使用,只能引导【名词性从句】,即主语从句、宾语从句、表语从句等,意思是【什么(事、情况、内容等)】.例如:
What we need is more practice.主语从句
He told me what had happened to him on the island.宾语从句
This is what we have got from the project.表语从句
whatever :既可以引导名词性从句,也能引导【让步状语从句】,意思是【无论/不管什么(事、情况、内容等)】.
相互转化:只有在【引导让步状语从句】时,whatever=no matter what.
Whatever happens will never change my Chinese heart.主语从句
I'd like to do whatever I can to help you.宾语从句
对比:
Whatever happens will never change my Chinese heart.
Whatever happens,it will never change my Chinese heart.
=No matter what happens,it will never change my Chinese heart.
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