be to
01
将要, 预计
used for expressing possibility or for indicating something that is due to happen or take place
语法信息
形态构成
短语
状态动词
规则
不可分离
小品词
to
基本动词
be
现在时
be to
第三人称单数
is to
现在分词
being to
一般过去时
was to
过去分词
been to
例子
The president is to arrive in the country tomorrow.
总统将于明天抵达该国。
1.1
必须, 应该
used to express necessity or obligation
例子
You are to complete this project by Friday.
你必须在星期五之前完成这个项目。
