《Unit 7 International charities Grammar 1》
学习目标: 了解正确使用被动语态的语境；了解被动语态的基本结构；掌握被动语态的一般现在时和一般过去时。
课前自主预习： 翻译下列各句，并划出各句中被动语态结构
1. More money is needed for charity.
2. 80 per cent of these cases can be prevented.
3. The plane is also used as a training centre.
4. Local doct ors and nurses are invited on board.
5. 150 patients were operated on.
总结：被动语态结构________________________ 其意思表示_____________
