due在英语里用的广泛：

1. 到期的：Her baby is due in May. 她的BB预期五月出生。

2. overdue 过期的 The library called in all overdue books. 图书馆要求把逾期未还的书收回。

3. With all due respect, I disagree with you. 恕我直言, 我不同意你。

4. due to 由于 She failed due to her laziness.