He did invent the lightning conductor中为什么用do+动原,是什么语法?

When did he invent the telephone?变被动语态 He did invent the lightning conductor中为什么用do+动原,是什么语法? When did they invent the plane?改为被动语态. when did Karl Benz invent the car变成被动语句 when did they invent the personal compwhen did they invent the personal computer?这个用被动语态怎么说? LI Ming did his honework so hard ,so he -------(forget) the time Li Ping hardly hurt his feet in the accident,did he?-_______.He can walk as usual.A .Yes,he did B .No,he didn't C .Yes,he didn't D .No ,he did Jet Li is a very famous （a ）.He did much for the people after the earthquake.急. When ______ the car ________?选项:a、did,invent b、was,invented c、does,invenWhen ______ the car ________?选项:a、did,invent b、was,invented c、does,invent d、in,invented When did they invent the personal computer.用被动语态改写 1.When did you invent the strange machine 2.Where do people plant the trees (都改为被动语态) 英语翻译he invents the world according to his perceptions 中的invent 英语被动语态：Did Li Lei repair the door yesterday. Who did Li Ming visit the next day的意思 Who ▁the paper in the world?Cai Lun▁.A invented；did B was invented；was C did invent；was Tom did not buy the bike()did not he?did he?does he?do he? 连词成句.1.also,ate,good,food,he.2.the,the woed,are,before,word,is,is.3.is,he,moon,the,on.4.he,be,must,li lei.5.a,bus,comes,here.6.there,you,did,go,how.7.the,button,press.8.where,i,did,put,camera,the?9.is,here,the,rabbit.翻译1.the word heis b 初二英语题.急死.马上要睡觉了Li Lei told me he did well in the final exam.(改为同义句)Li Lei _____ me _____ he did well in the final exam.To spit in public places is not police.（改为同义句）_____ isn't polite _____ spit in pu