答案：C．首先根据时间状语yesterday morning，判断句子中的谓语动词用一般过去时，主语they（those flowers）是动作water的承受者，表示“花儿被浇”，所以用被动语态，一般过去时被动语态的构成是：主语+was/were+动词的过去分词，主语是they，be动词用were，water的过去分词是watered，故选C．

不可数名词没有复数形式,只有单数形式.不可数名词做主语时,谓语动词只能用单数形式.对啊，water是不可数名词，动词要用三单线watern.水；雨水；海水；海域v.给…浇水；供以水；加水稀释；流泪复数：waters第三人称单数：waters过去式：watered过去分词：watered现在分词：watering1，water 做不可数名词时候，解释为，水；雨水例子：Get me a glass of water.给我杯水。the sound of water hammering on the metal roof.雨水敲打金属屋顶发出的声响2，water做不可数名词时候，解释为，海域；（尤指）领海，困境例子：The ship will remain outside Chinese territorial waters.这艘船将继续呆在领海之外。the open waters of the Arctic Ocean.北冰洋的公共海域the man brought in to guide him through troubled waters...被请来帮助他渡过难关的人你个人理解，这里的waters应该是理解为第二种。你可以结合句子的上下文意思。希望对你有帮助

leave sth +过去分词,过去分词做宾语补足语 .sth 与过去分词是被动关系 .her garden 与 water 之间是被动的,花园被浇水.water 这里是动词 ,浇水的意思无疑后请采纳.书山有路勤为径,学海无涯苦作舟.-----------与君共勉-----------“watered” v.给…水喝（ water的过去式和过去分词 ）；在…浇水[洒水]；往（酒里）掺水；（尤指江河）流经并供水给（某地区）

过去式 过去分词 现在分词1.read read reading2.watered watered watering 3.offered offered offering4.grew grow growing5.forgot forgot,forgotten forgetting6.had had having 7.thought thought thinking8.sat ...1 read read read 2 water 应该不是动词吧？ 3 offer offered offered 4 grow grew grown5 forget forgot forgiven6 have/has had had 7 think thought thought8 sit sat sat 9 begin began begun10 run ran run顺便附上不规则动词表~（1） AAA型（动词原形、过去式、过去分词同形） cost（花费） cost cost cut（割） cut cut hit（打） hit hit hurt 伤害） hurt hurt let（让） let let put（放） put put read （读） read read (2) AAB型（动词原形与过去式同形） beat（跳动） beat beaten (3) ABA型（动词原形与过去分词同形） become（变成） became become come（来） came come run（跑） ran run (4) ABB型（过去式与过去分词同形） dig（挖） dug dug get（得到） got got hang（吊死） hanged hanged hang（悬挂） hung hung hold（抓住） held held shine（照耀） shone shone sit（坐） sat sat win （赢） won won meet（遇见） met met keep （保持） kept kept sleep（睡） slept slept sweep（扫） swept swept feel（感觉） felt felt smell（闻） smelt smelt leave（离开） left left build（建设） built built lend（借出） lent lent send （传送) sent sent spend（花费） spent spent lose （丢失） lost lost burn （燃烧） burnt burnt learn（学习） learnt learnt mean（意思是） meant meant catch（抓住） caught caught teach（教） taught taught bring（带来） brought brought fight （战斗） fought fought buy（买） bought bought think（想） thought thought hear （听见） heard heard sell（卖） sold sold tell（告诉） told told say（说） said said find（找到） found found have/has（有） had had make（制造） made made stand（站） stood stood understand明白understood understood (5) ABC型（动词原形、过去式与过去分词三者不同形） begin（开始） began begun drink（喝） drank drunk ring（铃响） rang rung sing （唱） sang sung swim（游泳） swam swum blow（吹） blew blown draw （画） drew drawn fly（飞） flew flown grow（生长） grew grown know（知道） knew known throw（投掷） threw thrown show（出示） showed shown break（打破） broke broken choose（选择） chose chosen forget（忘记） forgot forgotten (forgot) speak（说，讲） spoke spoken wake（醒） woke woke drive（驾驶） drove driven eat（吃） ate eaten fall（落下） fell fallen give（给） gave given rise（升高） rose risen take（取） took taken mistake（弄错） mistook mistaken ride（骑） rode ridden write（写） wrote written do（做） did done go（去） went gone lie（平躺） lay lain see（看见） saw seen wear （穿） wore worn be ( am, is, are )（是）was, were been 词原形 过去式 过去分词arise arose arisenawake awoke/awaked awokenbe was beenbear bore borne(携带)/born(出生)beat beat beatenbecome became becomebegin began begunbefall befell befallenbend bent bentbet bet betbind bound boundbite bit bitten/bitbleed bled bledblend blended blentbless blessed blestblow blew blownbreak broke brokenbreed bred bredbring brought broughtbroadcast broadcast/broadcasted broadcast/broadcastedbuild built builtburn burnt/burned burnt/burnedburst burst burstbuy bought boughtcast cast castcatch caught caughtchoose chose chosencleave clove/cleft cloven/cleftcling clung clungclothe clothed/clad clothed/cladcome came comecost cost costcreep crept creptcrow crowed/crew crowedcut cut cutdare dared/durst dareddeal dealt dealtdig dug dugdo did donedraw drew drawndream dreamt/dreamed dreamt/dreameddrink drank drunkdrive drove drivendwell dwelt dwelteat ate eatenfall fell fallenfeed fed fedfeel felt feltfight fought foughtfind found foundflee fled fledfling flung flungfly flew flownforbid forbade/forbad forbiddenforecast forecast/forecasted forecast/forecastedforget forgot forgottenforgive forgave forgivenfreeze froze frozengainsay gainsaid gainsaidget got gottengild gilded/gilt gildedgird girded/girt girded/girtgive gave givengo went gonegrave graved graven/gravedgrind ground groundgrow girew grownhang hung/hanged hung/hangedhave had hadhear heard heardheave heaved/hove hesved/hovehide hid hiddenhit hit hithold held heldhurt hurt hurtkeep kept keptkneel knelt kneltknow knew knownlade laded ladenlay laid laidlead led ledlean lesnt/leaned lesnt/leanedleap leapt/leaped leapt/leapedlearn learnt/learned learnt/learnedleave left leftlend lent lentlet let letlie lay lainlight lit/lighted lit/lightedlose lost lostmake made mademean meant meantmeet met metmelt melted meited/moltenmistake mistook mistakenmisunderstand misunderstood misunderstoodoutgrow outgrew outgrownovercome overcame overcomeoversee oversaw overseenpay paid paidprove proved proved/provenput put putquit quitted/quit quitted/quitread read readrend rent rentride rode riddenring rang rungrise rose risenrive rived riven/rivedrun ran runsaw sawed sawn/sawedsay said saidsee saw seenseek sought soughtsell sold soldsend sent sentset set setsew sewed sewn/sewedshake shook shakenshave shaved shaved/shavenshear sheared sheared/shornshed shed shedshine shone shoneshoe shod shodshoot shot shotshow showed shown/showedshrink shrank/shrunk shrunk/shrunkenshrive shrove/shrived shriven/shrivedshut shut shutsing sang/sung sungsink sank/sunk sunk/sunkensit sat satslay slew slainsleep slept sleptslide slid slidsling slung slungslink slunk slunkslit slit slitsmell smelt/smelled smelt/smelledsmite smote smittensow sowed sown/sowedspeak spoke spokenspeed sped/speeded sped/speededspell spelt/spelled spelt/spelledspend spent spentspill spilt/spilled spilt/spilledspin spun/span spunspit spat/spit spat/spitspoil spoilt/spoiled spoilt/spoiledspread spread spreadspring sprang/sprung sprungstand stood stoodstave staved/stove staved/stovesteal stole stolenstick stuck stucksting stung stungswear swore swornsweep swept sweptswell swelled swollen/swelledswim swam swumswing swung swungtake took takenteach taught taughttear tore torntell told toldthink thought thoughtthrow threw thrownthrust thrust thrusttread trod trodden/trodupset upset upsetwake woke/waked woken/wakedwear wore wornweave wove wovenweep wept weptwin won wonwind wound woundwork worked/wrought worked/wroughtwring wrung wrungwrite wrote writtenread read readingwatered watered wateringoffered offered offeringgrew grown growingforgot forgotten (无现在分词，因为forget是个瞬间动词，你不见得一直在忘记吧？！)had had havingthought thought thinkingsat sat sittingbegan begun beginningran run running

加ed的英语单词：watered、cooked、collected、wanted、glowed等。 1、watered 英 ['wɔ:təd] 美 ['wɔ:təd] adj.掺水的;洒有水的;<美>加虚股的;面值增加而实值未按比例增加的 v.给…水喝( water的过去式和过去分词 );在…浇水[洒水];往（酒里）掺水;（尤指江河）流经并供水给（某地区） 2、cooked 英 [kʊkt] 美 [kʊkt] adj.煮[烹]熟的 v.烹调( cook的过去式和过去分词 );编造;篡改;密谋 3、collected 英 [kəˈlektɪd] 美 [kəˈlɛktɪd] adj.镇定的;收集成的 v.收集( collect的过去式和过去分词) 4、wanted 英 [ˈwɒntɪd] 美 [ˈwɑ:ntɪd] adj.受通缉的;被征求的 v.缺少( want的过去式和过去分词 );应该;打算;需要…在场 5、glowed v.（无焰地）燃烧( glow的过去式和过去分词 );脸红;尤指热的物体发出微弱而稳定的光;喜形于色答题推荐举头望明月下一句幽默句子粤语？恭喜侄女新婚的诗句？不能现场悼念朋友长辈逝者的短句？泡椒肝腰家常做法？诈骗罪1000万判多少年？国企升职靠什么？怎么哄人消气？一句话形容奶茶高？有哪些航空公司？反驳平安夜的经典语言？爷爷辈惊艳的名字？地三鲜指哪三样菜？形容锻炼身体的励志诗句？汽车交强险去哪买？车厘子文案朋友圈短句？红萝卜炒肉丝的家常做法？