到站了，但你没买票。你不该的。
The stop has arrived, but you haven't bought a ticket. You shouldn't.
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shouldn't英 /ˈʃʊdnt/|美 /ˈʃʊdnt/
解释
shouldn't 后省略了 have bought a ticket；前句已出现 buy a ticket 的完整表达，省略的购票行为可直接推知。
The stop has arrived, but you haven't bought a ticket. You shouldn't.
shouldn't 后省略了 have bought a ticket；前句已出现 buy a ticket 的完整表达，省略的购票行为可直接推知。