第 67 课: 各种职业；感觉及各种活动-5

I am sick. You are not sick. You are a nurse. 我病了，你没病，你是护士

I am a doctor. I am not sick. You are sick. 我是医生，我没有病，你病了

I am repairing a car. 我在修车

I am working on someone's teeth. 我在给人治牙

I am baking bread. 我在拷面包

I am typing on the typewriter. 我在用打字机打字

I am teaching the students. 我在教学生

We are reading. 我们在读书