1、本网站免费注册后即可以下载,点击开通VIP会员可无限免费下载!
2、资料一般为word或PPT文档。建议使用IE9以上浏览器或360、谷歌、火狐浏览器浏览本站。
3、有任何下载问题,请联系微信客服。
扫描下方二维码,添加微信客服
You must not be allowed to smoke.
It is bad for you.
Do your parents allow you to drive?
No, they don’t.
You can not be allowed to drive.
You are too young.
Do your parents allow you to choose your
own clothes?
No, they don’t.
You should be allowed to choose your own clothes.
You’re no longer a kid.
◆ 温故 ◆
在英语中,动词有两种语态,即主动语态和被动语态。主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者。在前面两个单元我们已经学习了一般现在时的被动语态和一般过去时的被动语态,它们的结构为:are/ is +及物动词的过去分词, were/ was+及物动词的过去分词。
◆ 知新 ◆
本单元我们主要了解含有情态动词的被动语态。它的结构是什么呢?观察下面
例句中含情态动词被动语态的各种形式
,然后补全结论中所缺的内容。
【例句】
1. Many trees should be planted in the
mountains.
应该在山上种许多树。
2. You can take this book home. (改为被
动语态)
→This book can be taken home (by you).
3. This problem can’t be worked out very
easily. 这道题轻易算不出来。
4. Must the work be done at once?
这项工作必须立即完成吗?
【结论】
A. 含有情态动词的被动语态的结构为:情