关于从句时态.The teacher didn’t blame him for what he did last fri

关于从句时态.The teacher didn't blame him for what he did last friday.
这是一句翻译的标准答案。
我写的是
The teacher didn't blame him for what he had done last friday.
这句答案里主句didn't blame。为什么从句还是did 搞不懂了。就算有last friday。但是也遵循宾语从句时态的呀。

换一种说法希望你能看明白：
The teacher didn't blame what he had done last friday.这句话肯定是对的,因为what 引导的是一个宾语从句.句子结构是:主+谓+宾从,这里的宾语和谓语产生了逻辑关系,所以从句一定要遵循时态规则的,即,what he had done 是过去的过去,要用完成时.
再看看原句：The teacher didn't blame him for what he did last friday.
句子结构：主+谓+宾+宾补 这句话中 for 引导的原因状语作him的宾语足语,跟宾语him是并列的,并不跟谓语产生逻辑关系,跟谓语产生逻辑关系的只有him,for引导的宾主补足语只是补充说明他上周五做的事情.
所以应该用did,过去式.

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