to do不定式的一般式
to be done 一般是的被動
to be doing 一般式的進行時
to have done不定式的完成式
tohave beendone不定式完成式的被動都與什么時態(tài)連用？或什么句式下用??？它不表示 時態(tài)，只表示不定式與主句謂語的先后關(guān)系。
to do →to be done to be doing to have done →to have been done 動詞不定式的用法,這幾個怎么回事?
to do →to be done to be doing to have done →to have been done 動詞不定式的用法,這幾個怎么回事?
英語人氣：107 ℃時間：2019-11-13 06:24:48
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