把下列句子改为被动语态1.Isawtheboyrunyesterday.2.Hetoldmethathewouldcomebacksoon.3.Youcanfindalotofdifferencesbetweenthetwolanguages.4.Doyouwateryourflowerseveryday?5.Thewindblewdownthebigtreelastnight.6.Ithinkthatheisright.7.Hehadnotthrownthebadfood.8.Motherwasnotmendingthetrousers.9.TheywouldnottakehimtoBeijing.10.Nobodyknewmeinthistownatthattime.answers：1.Theboywasseentorunbymeyesterday.2.Iwastoldthathewouldcomebacksoon.3.Alotofdifferencescanbefoundbyyoubetweenthetwolanguages.4.Areyourflowerswateredeveryday?5.Thebigtreewasblowndownlastnight.6.Itisthoughtthatheisright.7.Thebadfoodhadnotbeenthrown.8.Thetrouserswerenotbeingmendedbymymother.9.HewouldnotbetakentoBeijing.10.Iwasknownbynobodyinthistownatthattime.