has become是什么時態

　　Thailand has become the tourist mecca of Asia.

　　泰國已經成為亞洲旅游勝地。

　　The Internet has become part of everyday life.

　　互聯網已成為日常生活的一部分。

　　Since her death, she has become a cult figure.

　　她死后已成為人們頂禮膜拜的人物。