1.There_____some forests here ten years ago.But now we can s

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1.There_____some forests here ten years ago.But now we can see nothing.为什么填used to be?不是将来词才用be吗?2.You______all those clothes.We have a washing machine to do that sort of thing.为什么填needn't have washed?不填shouldn't have washed?3.This pen looks like mine,yet it isn't.Whose______it be?为什么填can?顺便解释后句意思.4.—Who is the girl standing over there?—Well,if you______know,her name is Mabel.为什么填must?

1.to作为不定式时后面一律加动词的原型.be是动词原型.当然要用be.别看着be就想着将来时,看看前面的uesd to,这是个短语,意思是过去常常.2.结合句子意思来看,后面那句话是我们有洗衣机来洗.如果是shouldn't的话就是你不应该洗那些衣服,衔接不起来对吧,所以应该是needn't,你不需要洗那些衣服,我们有洗衣机来做.3.这里的can表示推测.can有表示推测的用法,后句意思是,这会是谁的呢?4.这个可能和习惯有关了.语言习惯.意思是如果你一定要知道的话,她的名字是Mabe.话说must的意思就是一定,必须.其他选项呢?比较一下.嗯.

1 We have been here since ten years ago.-------------------- Mr.Smith was thin ten years ago,but now he is quite heavy.的意 we lived here ten years ago 改为现在完成进行时 We ________to Shanghai ten years ago. Now we()by train or bus,but many years ago people()travel by I can swim now but couldn't swim when l ___ ten years old. We had to walk to school two days ago,but now we can take th he worked in a lawyer's office years ago ,but he is now work My sister came here ten years ago(同义句） they came here over ten years ago的同义句 1.He（）a pupil ten years ago.Now,he（）a driver. jane is now ___she was ten years ago