while walking in the street ,you have to be very careful toavoid__down by passing cars or trucks.a.to be knocked b.being knocked 答案为什么不是a?不应该是将来吗?虽然avoid+doing,可是前面还有while while 的主句不是要+done吗?

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whilewalkinginthestreet,youhavetobeverycarefultoavoid__downbypassingcarsortrucks.a.tobeknockedb.bein

while walking in the street ,you have to be very careful toavoid__down by passing cars or trucks.a.to be knocked b.being knocked 答案为什么不是a?不应该是将来吗?虽然avoid+doing,可是前面还有while while 的主句不是要+done吗?
while walking in the street ,you have to be very careful to
avoid__down by passing cars or trucks.a.to be knocked b.being knocked
答案为什么不是a?不应该是将来吗?虽然avoid+doing,可是前面还有while while 的主句不是要+done吗?
在什么时候while +done：doing+when?
都表示什么?
就像这道题while watching tv,___
a.the doorbell rang b.we heard the doorbell ring c.we heard
the doorbell rings d.we heard the doorbell rang
如果是B.C.D怎么分析?
为什么?

while walking in the street ,you have to be very careful toavoid__down by passing cars or trucks.a.to be knocked b.being knocked 答案为什么不是a?不应该是将来吗?虽然avoid+doing,可是前面还有while while 的主句不是要+done吗?
说的有些混乱哦.
首先回答你的第一个题,为什么不选a呢?没错,while 的主句是要+done,但是答案要是knocked,才符合.比如,make sth done这个结构,只能说 I made the car damished.而不说I made the car to be damished.或者I made the car be damished.
第二,选B.
首先排除a,因为a使整个句子没有主语.
剩下b,c d.记住hear sb/sth +doing...或是do原形.一般情况,动作发出者不是人而是物体时,用动词原形.
这里的选项中没有ranging,而且动作的发出者不是人,所以用原形ring.
不知道我的浅见对你有没有帮助.

1.avid+doing 防止被撞，跟WHILE无关。being done 也有将来时的意思。
2.hear 属于一类感官动词，后跟不带TO的动词原形。

While I was walking in the street,I met Liu Dehua.转化为I met Liu Dehua while I was walking in the street.while换when, in the street,a terrible car accident happened,resulting in three deaths. A While walking B Walk C Walking D When I was walking walking in the sun walking in the walking in the sun Walking In The walking in the I happened_(meet)one of my old friends while I was walking in the street I saw an accideng_____i was walking in the street.------中选 while before after until While John was walking to school ,he saw a cat in the tree 对in the tree 提问 while walking in the garden,he hurt his leg.这句话可不可以说成：while having walked in the garden,he hurt his leg.为什么? While I was walking in the street,I met Liu Dehua.可不可以转化为I was walking in the street,while I met Liu Dehua.后半句中应用while还是when?转化为I was walking in the street while I met Liu Dehua. While I was walking down the street,I saw a cat in the tree 改为同义句 walking in the sun歌词 walking in the sky歌词 WALKING IN THE LIGHT 歌词 Walking in the Sky 歌词 Walking In the Park 歌词