n.假设的事情，假定，预设

原形：presupposition复数：presuppositions

Every student in this class passed the exam.
这个句子的预设前提是这个班级的所有学生都参加了考试并且都通过了。
The sun is up; it's morning.
这句话预设了如果太阳升起，那么现在就是早晨。
I saw John at the park yesterday.
预设是说话者认为John有自由意志且在公园出现是可能的，且这是发生在昨天。
She is wearing a dress; she must be going to a party.
这个句子假设穿裙子通常是去参加派对的一种打扮。
They're flying to Paris; they must be on vacation.
这句话预设了去巴黎通常与度假相关。
The door is locked; nobody is inside.
这个句子假设门被锁上意味着里面没有人。
He's a doctor; he saves lives.
这个句子预设了医生的职业是治疗和拯救生命。
If it's raining, we won't go for a walk.
这句话预设了如果下雨，就不会去散步。
The store is closed; it's Sunday.
这个句子假设商店周日通常不开门。
They are siblings; they have the same parents.
这个句子预设了他们共享同一对父母，从而他们是兄弟姐妹。