1·You required your pay in advance, and I've paid you.
你要求提前付款，我已经付过了。
2·You don't have to pay in advance.
你不必先付款。
—— 《新英汉大辞典》
3·Do you have to pay in advance?
你需要预先付帐吗？
4·He will pay in advance salary.
他要预支薪水。
5·You have to pay in advance.
你必须预先负钱。
6·Better to pay in advance.
最好还是提前付钱给他们。
7·Worse, you have to pay in advance.
更糟糕的是，你还得先付钱。
8·I must ask that you pay in advance.
这里需要的是先付钱。
9·"Pay in advance," said the coachman.
“先付钱。”那车夫说。
10·You must pay in advance.
你们必须预先付款。