while they can not do their homework,they copy from their schoolmates.为什么要把 while改为 when?

while they can not do their homework,they copy from their schoolmates.为什么要把 while改为 when? They are not ( ) while they do their homework.A.enough careful B.careful enough C.enough carefully D.carefully enough my shoes are worn out - ------------------A :can not they be mended?B:lets me have a look C:how much do they cost D:can not they mended It was not until midnight they reached the camp site.A.that B.when C.while D.as It was not until midnight ( )they reached the camp site.A.that B.when C.while D.as We insisted on not inviting her ,while they insisted that she__A wasinvited Bwould be invited Cshould invite D be invited Canners can can what they can, but can not can what they can not can.是什么意思快,急是绕口令 They can stop and go easily,and they can talk while biking.是啥意思 --Jenny,can you take good care of __ while I'm not ay home?--Of course ,I can.A.myself B.yourselfc,ourselves d,yourselves并翻译 --Jenny,can you take good care of __ while I'm not ay home?--Of course ,I can. A.myself B.yourselfC.ourselves D.yourselves they can even not/they can not even/they even can not这三者有语义上的不同吗 连词组句.can,they,swim,not(.) It was not until recently ( ) many people began to realize they were wrong.A when B while C as D that 选什么,为什么? They came to the conclusionn.________ by a computer.A.that not all things can be done B.because of not all things be doneC.being not all things can be done D.because not all things can be done How can they be happy i____ they are not free? Do you know Taikonauts will fiy to the moon ____yes,not only ( ) fly around the moon,but also ( ) land on the moon land.A ：they can；they will B:can they; they willC：they can ;will they D:can they ; will they __I admit that there are problems,I cannot agree that they can't be sovled.A.Since B.As C.While D.If语法点是什么么呢？ While shopping,people sometimes can't help___into buying something they don't really needA to persuad B persuading C being persuaded D be persuades