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问题 worthwhile 用法

The cartons are worth(while) saving.（CGEL） 请问这句话里面用worthwhile也是对的吗？为什么有的地方说worthwhile 主语不能是物，只能写成it is worthwhile saving the cartons.

问题 倒装句学习

Only over the past 30 years have scholars examined history from the bottom up.请问老师。这句是完全倒装句吗？怎么理解倒装句？

问题 along可以吗？

A poor man found the purse near a shop ________ the way home.这里答案是on.老师，along可以吗？

问题 句子成分分析

proved做定语吗？即是否能这么改写：“the hydrogen itself was proved too expensive.” or "the hydrogen is too expensive which was proved."

问题 way用法

There is something badly wrong with the way standards for school science being set in the US这里的way后面为什么直接跟了standards名词？是错误语句吗？

问题 what的作用

语法填空，主要是原因，句子分析以及what的作用:You can't imagine what difficulty the freshmen had ____ (consult) the French dictionary.

问题 now可以作主语吗

Now is the time to sound the alarm.now可以作主语吗?

问题 问将来天气的说法

问明天天气，经常见到的是：What will the weather be like?是否可以说：How will the weather be? 

问题 主谓一致疑问

The glass were kept hot enough.主语the glass，查了一下字典，glass是不可数名词。谓语为什么用were.记得之前学的是主语不可数名词，谓语要用单数，才能主谓一致?

问题 这里为啥不能用opened

He left the door open.为啥不是He left the door opened.

问题 except 后面可以接“疑问词+不定式”吗？

...。如：He never came except when he was in trouble.I know nothing about the accident except what I read in the paper.同时我知道，except后面也可以接“不定式”。如：He hardly spoke except to say hello.She seldom goes out except to go to Mass.I rarely need to go into the city cent...

问题 形容词+to do 的语态问题

...事件或活动充当真正意义上的主语It is easy to fool him.然后The book is interesting to buy中，为什么to buy不能用被动式？这里也并不是一个事件或活动作主语，无法变换成To buy the book is interesting，再加上interesting是表示事物的性质特点，...

问题 People said her husband was a criminal. 改句型

...么 be said to be 也可以，如何理解？还有一题 People said that there was gold in the cave.答案： There was said to have been gold in the cave. 请问 There was said to be gold in the cave. 是否可以？如何理解？谢谢老师！

问题 take care to do sth中的不定式是什么成分

Take care to be very careful. 注意要非常小心。Take care to avoid kinking the wire. 当心别让电线扭结。Take care to label all the disks with the correct file names.  在所有磁盘上小心贴好标有正确文件名的标签。请问其中的不定式是什么成分？

问题 定语从句中的 send sb sth 必须加上to吗

Mr Smith is the person who I sent my application.有书上说上面的句子不妥，应该改为：Mr Smith is the person who I sent my application to.Mr Smith is the person to whom I sent my application.如果你用的是 send sth to sb 来理解上面的句子，当然要加上 to；但如果是...