[00:03.84]It is a book. 

[00:07.29]What is that? 

[00:11.26]It is a notebook. 

[00:14.97]What are thses? 

[00:18.42]They are books. 

[00:23.48]What are those? 

[00:26.78]They are notebooks. 

[00:30.07](2)I am a student. 

[00:33.10]You are a teacher. 

[00:36.68]We are students. 

[00:41.48]You are teachers. 

[00:45.87]He is a farmer. 

[00:51.07]She is doctor. 

[00:55.04]They are farmers. 

[01:00.24]They are doctors. 

[01:03.95](3)Is he a farmer? 

[01:08.21]Yes,he is. 

[01:12.88]Is she a nurse? 

[01:17.01]No,she isn’t.She is a doctor. 

[01:22.63]Are you students? 

[01:26.47]Yes,we are. 

[01:29.76]Are they students? 

[01:33.05]No,they aren’t.They are teachers. 

[01:40.31]what 

[01:41.89]什么 

[01:43.47]book 

[01:45.46]书 

[01:47.44]notebook 

[01:49.84]笔记本 

[01:52.25]I 

[01:54.10]我 

[01:55.96]student 

[01:58.77]学生 

[02:01.57]you 

[02:03.56]你，你们 

[02:05.54]teacher 

[02:07.74]教员 

[02:09.93]he 

[02:12.27]他 

[02:14.61]she 

[02:16.67]她 

[02:18.74]farmer 

[02:21.27]农民 

[02:23.80]doctor 

[02:26.06]医生 

[02:28.32]nurse 

[02:30.45]护士 

[02:32.58]we 

[02:35.05]我们