Mike is sure to go to the films this afternoon if he is not occupied.为什么要用is sure to go to the films

问题描述:

Mike is sure to go to the films this afternoon if he is not occupied.
为什么要用is sure to go to the films

is sure to 是确定的意思,not sure to是不确定的意思‘

假如有空闲,麦克确定去电影院.
is sure to 未确定的意思.