经典句型:These books are overdue. 这些书过期了。

A:I'd like to return these books.
甲:我要还这些书。
B:These books are overdue.You have to pay a fine.
乙:这些书过期了。你需要交罚金。
A:How much should I pay?
甲:我需要交多少钱?
B:Fifty cents.
乙:50美分。

经典句型:These books wer due last friday. 这些书应上个星期五就还。

A:Are these books overdue？
甲:这些书过期了吗?
B:Yes.Theses books wer due last Friday.
乙:是的。这些书应该上个星期五就还。
A:I forgot to renew them.
甲:我忘了续借了。
B:You have to pay a fine first,and borrow them again.
乙:你必须先交罚金，然后再重新借阅。
A:I see.
甲:我知道了。

句型讲解：
overdue的意思是“过期的，延误的”。如:an overdue bill过期的账单，an overdue train 晚点的火车，an overdue check过期支票，overdue debt 过期债款。