L69 But not murder
单词理解
语法理解
被动态
一般时态的被动态be done:
- is done 一般现在时被动态
- was done 一般过去时被动态
- will be done 一般将来时被动态
完成时态的被动态have/had been done
- have been done 现在完成时被动态
- had been done 过去完成时被动态
分词作状语被动态,强调先后,having been done
一般时态的被动态be done:
完成时态的被动态have/had been done
分词作状语被动态,强调先后,having been done
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