be careful to do STh否定句be careful not doSTh为何不可以是don,t be ca

be careful to do STh否定句be careful not doSTh为何不可以是don,t be ca be careful to do sth和be careful(not) to do sth的用法 don't be careful和be not careful的区别 be careful to do sth造句 Be careful.的否定句是 be careful .(否定句） be careful的否定句 Be careful!Don not be late for school!合并为一句 be careful doing和be careful to do的区别? Be careful not------ill take care ; be careful ;to be careful Be careful Don't ( )your key.填空