be careful _______(knock) down when you walk across the road
1个回答
没错!
这里指“横马路时注意别被车撞倒
由于表被动,同时带否定意思,故用否定的不定式的被动式
be careful not to do sth 小心别.
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Be careful when you go cross the road 改错,谢谢^ ~ ^