I fall off from my bike 要怎么改?

问题描述:

I fall off from my bike 要怎么改?

不用加from
因为off在这里就是个介词.
还有时态也不对.
应该是过去时态
也可以说fall from
改为:
I fell off my bike.
I fell (down) from my bike.fell (down) from 中down和from两个介词在一起不矛盾吗?down在这里是个副词。I saw him fall down from the tree .我看到他从树上摔下来了。down什么情况是当做介词,什么情况是当做副词?down prep. 沿着,往下:后面有宾语,就是介词。如:Go down the street.沿着这条街走。当down当副词时,是不能直接加宾语的。She went down to the kitchen again.她又下到厨房去了。