it's said that potato chips __by mistake about a hundred yea

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/23 15:43:58

it's said that potato chips __by mistake about a hundred years ago A INVENT b invented
c are invented d were invented
为什么选D 选B不行吗?

首先,你应该知道主语是potato chips,谓语是invent,那么,薯条和发明之间是什么样的关系呢?是主动还是被动呢?不可能是薯条自己发明东西吧?所以,肯定是用被动语态be done 的形式.排除A,B.B的时态是过去时,表示过去发生的动作.
而C,D的不同是时态的不同,分别是一般现在时的被动和一般过去时的被动.由题目中的a hundred years ago,知道的过去发生的事情,所以选什么不用我说了吧?
再问：被动是什么意思，主动的就不用加BE动词吗？怎么判断一个句子是被动还是主动？被动的一定要加BE动词吗？
再答：英语的时态分为主动语态和被动语态。主动语态表示主语是执行者。如：Yesterday I parked my car outside the school.昨天我把我的汽车停在了学校外边，我是主语，我是执行者，是我停车，所以是主动。被动语态表示主语是动作的承受者。如：Our house was built in 2000.我们家的房子建于2000年。主语是我们家，谓语是建造，我们家自己建造，还是我们家被建造呢？当然是被建造了，所以是被动语态。至于be done 是被动语态的必须形式，依看见被动语态必须把谓语变为be done 的形式，明白吗？不懂可以再问。希望可以帮助你！

it's said that potato chips __by mistake about a hundred yea it's said that potato chips __by mistake about a hundred It is said that potato chips ______ by mistake about a hundr It is said that potato chips KFC _____ by mistake about one did you know that potato chips were invented by mistake?翻译 Potato chips were inbented by mistake(改为主动语态） potato chips 1 Henry set up a company that _____(生产） potato chips for KFC it's about one hundred meters along . It's [d..] to believe that the sun is about one hundred and 英语翻译1、when that happens,it is not a mistake:it is mankind's When that happens,it is not a mistake:it is mankind's instin