be expected to do 做预期
be required to do 被要求做
be meant to do 旨在做
be scheduled to do 计划做
be destined to do 注定做
A: What are you supposed to be doing here?
A：你按理说在这里做什么呢？
B: I'm supposed to be helping my mom with the shopping.
B：我应该在这里帮我妈妈买东西的。
1) 表示义务或责任
2) 表示预期或计划
3) 表示据说、传闻
4) 表示规则或规定
5) 表示原本的意图
1. 根据规定、习惯或要求应当做某事
2. 预期或预料会发生某种情况
phrase
1. to be expected to do something based on rules, laws, or social norms
2. to be intended or planned to do something
Synonym: be expected to, be required to