Be sure to stay alert when you're walking alone at night.从句为什么用进行时?

be sure of 和 be sure to be sure to do 用Be sure to、Be sure to do 、Be sure of、Be sure that 造句 ___that the hotel is good to____A making sure of;to sure B make sure;stay C making sure; stay in D make sure;stay in为什么 Be sure to stay alert when you're walking alone at night.怎么翻译,从句为什么用进行时? Be sure to stay alert when you're walking alone at night.从句为什么用进行时? be sure to do sth. be sure to go there they are sure to be make sure,be sure of ,be sure to do,for sure的区别 be sure of be sure to do 的区别· 辨析 be sure of 与be sure to do sth be sure to 和be sure of 区别和用法 be sure to/be sure of举例区别 be sure to 与 be sure of 的区别 Be sure of与Be sure to有什么区别 祈使句时 是to be sure 还是 be sure If you _____happen to come to this town ,be sure to stay with us.A.always B.ever C.never D.not