I am an teacher at a junior high school(was,a doctor,before,I went to Xiamen)改写句子
(1) I am an teacher at a junior high school (说明现在情况,我是一所初中的老师)
用一般现在时态说明现在情况
(2)I was a doctor before I went to xiamen (说明过去的情况,去厦门之前,我是一个医生)
用一般过去时态说明过去的情况
I am an teacher at a junior high school(was,a doctor,before,I went to Xiamen)改写句子
(1) I am an teacher at a junior high school (说明现在情况,我是一所初中的老师)
用一般现在时态说明现在情况
(2)I was a doctor before I went to xiamen (说明过去的情况,去厦门之前,我是一个医生)
用一般过去时态说明过去的情况