(not)having done sth,sb did

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(not)having done sth,sb did

not having done sth 意思:已经不做某事了 having done sth 意思:已经完成某事了 sb did sth 意思:做了某事(这件事或许已经完成或没完成)

not having done sth 没有做某事;sb did sth某人做某事