半助动词 be bound to He must be in the office.=He is bound to be in t_英语解答

半助动词 be bound to
He must be in the office.=He is bound to be in the office .为什么?能用be sure to

人气：271 ℃　时间：2020-02-05 15:04:44

解答

be bound to 表示注定要、计划好的意思
must 表示一定要、迫于压力的原因
两者意思差不多.
be sure to = be bound to 一定要... 所以可以替换.