为什么 To do today's homework without the teacher's help is very difficult.的主语中心词为to do?

To do today's homework without teacher's help is difficult的主语为什么不是homework? 为什么 To do today's homework without the teacher's help is very difficult.的主语中心词为to do? To do today's homework without teacher's help is difficult的主语为什么是to do today's homework? 九上英语书疑问For example,playing volleyball today ang playing ping-pong the next day .为什么句中用 playing而 不用 play I hope you think that my advice is worth taking .为什 么句中 可以用hope sb.do 老师教过hope to do 和ho It's going to be a busy day today.I have ___ work to do是填a lot 好还是much好?为什么? Don't forght ------- your mother's birthday present today,---------?A to buy ' will you B buying ' won't you C to buy ' do you选a 为什么 ()want()to do it today. It`s going to be a busy day today.I have much work to do. Today we want to (s ) what can modern zoos do to show the grandchildren of today's visitors these animals翻译 we can't leave today's work to do t_____填什么才合适 They don't have_______homework to do today.1为什么为什么！家庭作业不是不可数吗？ what's do you have clsses today? To do today's homework without the teacher's help is very difficult.中主语的中心词 一道初中英语题today's homework is__(big,huge)Today's homework is__(big,huge)It's going to take us all night to finish it.为什么啊 being Sunday today ,we do not have to work.为什么前面要改成it being i have 〔 〕to do today里是加something inportant还是inportant something为什么？ 英语翻译I( )much homework to do today.