一般过去时主动与被动的句子

主动运输:耗能,从低浓度到高浓度,需要载体；被动运输：不耗能,从高浓度到低浓度.被动运输,分为自由扩散和协助扩散；自由扩散不要载体,协助扩散需要载体.因为自由扩散和协助扩散都不耗能所以称为被动运输.

/>Englishisspokenbylotsofpeopletoday.Thetreesarecutbytheworkers.SomevegetablesandfruitsareeatenbyPau

PeoplespeakSpanishinSouthAmerica.Thestudentsmustfinishthehomeworktoday.Wemustlookupallthewordsinadic

Ⅰ.把下列主动语态改为被动语态:1．WeoftenusearecorderinourEnglishclass.2．Theywillshowanewfilmnextweek.3．Whendidtheyb

Itakeabook.Abookistakenbyme.Itookabook.Abookwastakenbyme.Ihavetakenabook.Abookhastakenbyme.Ihadtaken

Havingfinishedmywork,Idrovehomealone.Copiedagainandagain,thisarticlebecamemoreandmorepopular.

一般现在时态的被动语态Weareallowedtogoout.我们被允许外出Thequestionswereansweredinpublic.问题被公开答复了一般过去时被动语态Thedoorwasop

1.UncleWangmendedthecomputeryesterday2.thelettershouldbewrittenbypencil3.thewordcanbelookedupbyyouin

Doyouoftendoyourhomeworkathome?Alittleboyhasalreadyfoundyourwallet

1Thisthingmustbedonebyyouassoonaspossible.2Thechildrenmustbetakengoodcareofbuus.3Student'stimemustbe

1.Abookwillbewrittenbyhim.2.Iamoftenhelpedbythem.3.Theroomisgoingtobecleanedbyus.4.Theoldmanisusuall

1.Thestudentscleantheirclassroomeveryday.Theirclassroomiscleanedbythestudentseveryday.2.Theysetupthe

Whenallthosepresentsatdownhebeganhislecture.

再答：再答：亲，对我的回答满意的话，就给个好评吧。如果还有不清楚的地方，可以跟我继续交流哦。

就是这样.下面是公式：be+动词的过去分词应用范围：表示被动的情况,一般是及物动词有被动语态,切记不及物动词与一些固定词组是没有被动语态的.例如：happen,takeplace另外还有have等词不

再答：亲，对我的回答满意的话，就给个好评吧。如果还有不清楚的地方，可以跟我继续交流哦。

书卖的好：sellswell不用be　sold　well　如果是被卖出　就是被动　所以下面的是　sells　well　和have　been　sold再问：那第一个呢再答：第一个就是sell　well的

以助动词do为例1.一般现在时：主动：do/does被动：am/is/aredone2.一般过去时：主动：did被动：was/weredone3.一般将来时：主动：will/shalldo被动：wil

主动免疫是机体接受抗原刺激自身产生抗体或者致敏淋巴细胞,被动免疫是直接给机体输入外源抗体或者致敏淋巴细胞!

一般现在Idomyhomeworkeveryday.Myhomeworkisdone(byme)everyday.Isyourhomeworkdoneeveryday?Myhomeworkisn�