英语被动语态When was computers invented?Who was chopsticks invente

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/15 18:58:36

英语被动语态
When was computers invented?Who was chopsticks invented by?What was calculator used for 能不能解释为什么这三个句子后面有的能跟介词,有的不能,尽量通俗一点

When was computers invented? 对时间状语提问不用加介词.
Who was chopsticks invented by?对动作施加者提问需要加介词by.
What was calculator used for? be used for用来做...是固定搭配,这个需要识记.
满意请采纳

Who invented the first television?（改为被动语态）___ ___ was the fi .When was _____ umbrella _____?A.an; invented B.the; invente 英语-Unit 9 When was it invented? when was this bridge built 被动语态 who invented tea?改为被动语态 Who invented it? 改成被动语态~ 英语who was it invented by 用who 还是whom? when was the ...invented? who were they invented by? what an when was the car invented who invented it是被动语态还是主动语态被动语态和过去完成时The computer was invented in 1800可以转换为The computer 英语：九年级第九单元When was it invented?