Please be careful when you ______ the crowded street.这里是否只能填 cross?可不可以填 are crossing?如果不行,为什么呢?cross是短暂动词吗?

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Pleasebecarefulwhenyou______thecrowdedstreet.这里是否只能填cross?可不可以填arecrossing?如果不行,为什么呢?cross是短暂动词吗?Ple

Please be careful when you ______ the crowded street.这里是否只能填 cross?可不可以填 are crossing?如果不行,为什么呢?cross是短暂动词吗?
Please be careful when you ______ the crowded street.
这里是否只能填 cross?
可不可以填 are crossing?如果不行,为什么呢?cross是短暂动词吗?

Please be careful when you ______ the crowded street.这里是否只能填 cross?可不可以填 are crossing?如果不行,为什么呢?cross是短暂动词吗?
1.当然也可以填are crossing.具体该填哪个完全根据上下文的含义来理解.如果句子强调进行的意味,填are crossing完全可以.而如果表明"总该是如此"的话,cross就更加合适.
2.cross从意思上就能判断它是个延续性动词.
3.更正楼上的说法,when引导的时间从句的动词并没有所谓瞬间/延续的限定,该从句同样也可以用进行时态.它是比较灵活的.
如:He entered the classroom when I was reading books.
4.当然while引导的时间状语从句一定要求其谓语动词是延续性动词,且用进行时居多.

每当过马路的时候都要小心，不是正在进行时，是一般现在时

应该填cross
when一般引导一次性动词，不用延续时态。而如果要填are crossing
的话，从句前的引导词就应该换成while了，因为while专门引导进行时态。

是时态不对，这里是祈使句 应该用一般现在时

Be careful,please?改成强调句 be careful用法Please be careful _____(spell)this new word. Please be careful when you go____the road.(cross) Please be careful when you go a( ) the road Please (be) careful and (not hurt) yourself.急需! Please be careful (not play ) with fire.空格填啥 Please,Don‘t be careful Don't为什么大写 Please be careful.These snakes are ____(poison). be careful be careful! be careful be careful please be ___ of the dog.look after your sister ___.A carefully;carefully B careful;carefullyC carefully; careful D careful;careful说明理由 She asked me_____knock off the glass of water.A.please be careful to not B.to be careful not toC.to be careful not D.not to be careful to be careful. Which one is better?be careful to your money!be careful for your money!Which one is better? please give me a explanation! Thank you!be careful about your money! Please be careful .Do not make the same ____ next time.急 求求了 Please look after your bag!我可以用Be careful your bag!能不能这样说? 动词填空：please be careful --------(not play) with fire虚线上怎么填?