英语状语从句1.when crossing the street,you should be careful.所示是什么

英语状语从句1.when crossing the street,you should be careful.所示是什么 Be careful when you are crossing the street. You must be careful when crossing the street.改为祈使句 Be careful when ( you are ) crossing the street. when crossing street,you must be careful be careful when you are crossing the street.可以改写成be careful while crossing the street,you should be careful句型转换：while __ _be careful when crossing the street. Be careful when you c_______ the street be careful while you are crossing the street（同义句） be careful when:you should be careful when _____ the street in big citi You should BE careful when you cross the street in the big c