最佳解答: expire verb
英英解釋：If something which lasts for a fixed length of time expires, it comes to an end or stops being in use:
1. Our television license expires next month.
2. The contract between the two companies will expire at the end of the year.
3. My membership in the club has expired.
你的第一個句子：His license is expired. 這裡的expired是形容詞。不能有be動詞後面若有分詞形態的字眼都是被動式的觀念，這樣會容易出錯！
2008-02-11 22:22:13 補充：
英英解釋：having come to an end or become void after passage of a period of time; "an expired passport"; "caught driving with an expired license"