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oing being done 完成式 having done having been done Ved (done) 完成式 done 時(shí)態(tài)(與謂語(yǔ)動(dòng)詞)語(yǔ)態(tài)(與主語(yǔ)或所修飾詞) 主語(yǔ) 賓語(yǔ) 賓補(bǔ) 表語(yǔ) 定語(yǔ) 狀語(yǔ) 不定式 動(dòng)名詞 現(xiàn)在分詞 過(guò)去分詞 Mary that there39。s someone _______for her at the door. A. waiting B. waited C. waits D. to wait , in the corner, sat three girls,_______. A. sew B. were sewing C. to sew D. sewing you know when