please be careful when you drive your in the snow.这里的 be 是什么用法,还有为什么是一般现在时?

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?