become的過去式和過去分詞是？

　　常見短語：

　　1、become abstracted 變得心不在焉

　　2、become accustomed to sth 習慣于某事

　　3、become acquainted 變得熟悉

　　4、become acute 變尖銳 become angry 發怒

　　5、become annoyed 變得生氣