微机继电保护测试:had been done与had done的区别,何时选前者,何时选后者?
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had been done是被动语态。后面多加名词。
had done.后面多加动词。/
被动和主动的区别
被动和主动的区别
前者是被动语态,后者是主动语态,
had been done是被动语态。后面多加名词。
had done.后面多加动词。/
被动和主动的区别
被动和主动的区别
前者是被动语态,后者是主动语态,