Having finished the homework,he went home.为什么用现在完成时不是过去完成时

Having finished the homework,he went to bed.Having finished ..有什么相关语法 73、______ his examination of the patient,the doctor wrote out a prescription.A：Having finished A：Having finished?为什么A：Having finishedB：FinishingC：FinishedD：Having been finished _____ the work we went home.A.Having finished B.Having been finished C.Have finished D.Have been finished 选哪个?为什么? Having finished the experiment ,he left the lab .这里的have为什么要是having having done在句首的时候是什么意思?如何用?比如,having finished the homework,they . ( ),he went home.A.finishing the work B.had finished the work C.after finished the work D.having finished the work _______ his examination of the patient,the doctor wrote out a prescription.A：Having finishedB：FinishingC：FinishedD：Having been finished 英语选择 ___ their homework ,the boys went out to play soccer A.having finished B.finishingC.being finished D.finished Having finished the homework,he went home.为什么用现在完成时不是过去完成时 David offered us a lift when he was leaving the office,but our word---?---,we declined the offer.A,not being finished B,not having finished C,had not been finished D,was not finished Walter offered us a lift when he was leaving,but ___ our work,we turned down the offer.A not finished B not having finished C not finishing D having not finished为什么选B,不选C the boy having finished his homework was playing the computer games这就话对吗the boy having finished his homework was playing the computer games与the boy finishing his homework was playing the computer games那句对? 现在分词的完成时态Having finished his homework,the boy went on to help his motherHaving finished his homework,the boy went on to help his mother.Not having finished his homework,he was forbiddento watch the game.两句中Having finished用 Having finished making the bed,she went on __________ the housecleaning with cleaning to clean at cleaning 翻译Having finished the letter,he folded it carefully and sealed the envelop with a kiss谢谢 _____ their homework,they went to the playground to play footballa.finished b.having finished c.finishing d.to finish为何选B the experiment___,they decided to go on holiday for a week.A.to be finished B.having been finished答案B,为什么?谢谢 You can keep the book until you ___?A having finished readingB finish to readC will finish reading D have finished to read