While crossing the street,____________.

I saw him while he was crossing the street 与 He was crossing while crossing the street,you should be careful句型转换：while __ while you are crossing the street,you must be carefui句型转换 Why didn't you look around while crossing the street?的翻译 Be careful while crossing the street.Don’t forget ___ over b be careful while you are crossing the street（同义句） be careful Look around while you are crossing the street!You can never 英语语法问题：Be careful when/while crossing the street.这个句子是不是独立主格 I see you crossing the street _be careful when crossing the street. ---(be) more careful while crossing the road when crossing the street,the lady ------to the ground