他23岁时当了老师.是He was a teacher when he was 23还是he became a teacher when he was 23.为什么?
问题描述:
他23岁时当了老师.是He was a teacher when he was 23还是he became a teacher when he was 23.为什么?
答
was强调状态,became强调动作=_=所以成了用became