不定式 问did you enjoy yourself last night?答It's very nice of you .I appreciated(having been invited) to the party.请告诉我为什么这么用》括号里的

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不定式
问did you enjoy yourself last night?
答It's very nice of you .I appreciated(having been invited) to the party.
请告诉我为什么这么用》括号里的

appreciate后+doing,应为是被邀请,且发生在感激之前,故用-ing的完成式的被动式.