When crossing the road, you can't be too careful.这句话什么意思?

You must be careful when crossing the street.改为祈使句 Be careful when ( you are ) crossing the street. when的省略用法 when crossing the street,it is nrcessary to be careful对不对 The child was crossing the street when he suddenly-----[fall] to the ground. when crossing the street,the lady ------to the groundAfalls Bfell Chas fallen D had fallen Be careful when your crossing the street.这个句子错在哪,Be careful when your crossing the street.这个句子错在哪, At the crossing,when the light is red,we must_____快回答!快!在线等!~!~!~! When we are crossing the streets,we must look out_____ the traffic. at the first crossing paraphrase 'crossing the bar When you are crossing aroad, you must_______（注意）the traffic on both sides. he was knocked down(when crossing the street).请问括号中为什么可以这样用? Be carefully when ____ the road.A crossing B to cross C cross Be careful when crossing the road中的cross为什么加ing说清楚原因, When he was crossing the street,a bike koncked him down什么意思 don't be like a t____ when you cross the zebra crossing.空格填什么? which side must passengers look first when crossing the street in London? 有一道题是look out when you cross the road,用crossing可以吗?