《Unit 3 Online tours Grammar 2》
学习目标： 1.了解一般过去时和现在完成时的区别
2. 正确使用一般过去时和现在完成时
课堂活动展示: 一、仔细阅读句子，并划出句中时间状语
1. I heard of this three days ago.
2. They bought a new car last spring.
3. The Blacks have lived in Shanghai since 2000.
4. Mr. Wu visited Canada in 2000 and 2003.
5. Mr. Wu has visited Canada recently.
6. We have learnt about 3000 English words up to now.
7. Mum came back from the superm arket just now.
8. Mum has just come back from the supermarket.
