you must be carefui when you cross the street 祈使句怎么写______ _______when you corss the street,please.填什么

while you are crossing the street,you must be carefui句型转换___________the street,you must be careful Be carefui when you start a fire you must be carefui when you cross the street 祈使句怎么写______ _______when you corss the street,please.填什么 the policeman said you should be carefui 改为间接引语 变为间接引语 You should be more carefui next time,his father said to him. ( )carefui when you cross the road.A Be do B Do you be C Do be D Do 把下列交通标语改为祈使句（英语）谢谢大家.或者用祈使句改写下列句子.（郁闷,这些不都是祈使句吗?）1.No left turn.2.No parking.3.You must be carefui.4.You must look both ways before crossing the road.5.You shou You must be strong . you must be You must be hungry You must be joking You must be confident. You must be dreaming you must be careful you must be ___!(kid) You must be carful next You must be happy oh., you must be joking,救命