become用在現在完成時用什麼代替

用has become代替，例如：

1、May Day has become a venerable institution.五朔節已經變成一個神聖莊嚴的傳統節日。

2、The environment has become a very hot issue.環境已成為很熱門的話題。

3、The Internet has become part of everyday life.網際網路已成為日常生活的一部分。