【用besupposetodo造句子】在英语学习中，"be supposed to do" 是一个非常常见的表达方式，用于表示某人被期望、被安排或被要求做某事。它常用于日常对话、书面语以及正式场合中，表达一种责任、义务或约定。
下面是对 "be supposed to do" 的总结，并通过表格形式展示其常见用法和例句。
一、总结
"Be supposed to do" 是由 be 动词 + supposed（过去分词）+ to + 动词原形构成的结构。它通常用来表示：
- 某人应该做某事（责任、义务）
- 某事本应发生（预期与现实不符）
- 某人被安排/计划做某事
该结构在口语和书面语中都非常实用，尤其在表达“应该”、“必须”或“被要求”的时候。
二、用法及例句表格
| 结构 | 含义 | 例句 | 中文解释 |
| I am supposed to go to school. | 我应该去上学 | I am supposed to go to school at 8 a.m. | 我应该早上八点去上学 |
| You are supposed to finish your homework before dinner. | 你应在晚饭前完成作业 | You are supposed to finish your homework before dinner. | 你应在晚饭前完成作业 |
| He is supposed to arrive at 9 o'clock. | 他应该九点到达 | He is supposed to arrive at 9 o'clock, but he's late. | 他应该九点到达，但他迟到了 |
| We are supposed to meet at the station. | 我们应该在车站见面 | We are supposed to meet at the station, but I don't see him. | 我们应该在车站见面，但我没看到他 |
| The meeting is supposed to start at 10 a.m. | 会议应该在上午十点开始 | The meeting is supposed to start at 10 a.m., but it's delayed. | 会议应该在上午十点开始，但被推迟了 |
三、注意事项
- "Be supposed to" 不表示“必须”，而是一种“被期望”或“被安排”的意思。
- 它可以用于不同的人称和时态，如：I am, you are, they were, we are, etc.
- 在否定句中，可以用 "not supposed to" 表示“不应该”。
例如：
- You are not supposed to leave early.（你不应该早走。）
- They were not supposed to know about the plan.（他们不应该知道这个计划。）
通过掌握 "be supposed to do" 的用法，我们可以更自然地表达责任、安排和期望，使语言更加地道和准确。希望以上内容对你的英语学习有所帮助！