新概念英语青少版4A Unit 20

1、.,U20 One man in a boat,.,Listening and Understanding,Fishing is my favorite sport. I often fish for hours without catching anything. But this does not worry me.,.,Listening and Understanding,Some fisherman are unlucky. Instead of catching fish, they catch old boots and rubbish.,.,Listening and Unde

2、rstanding,I am even less lucky. I never catch anything not even old boots. After having spent whole mornings on the river, I always go home with an empty bag.,.,Listening and Understanding,You must give up fishing! my friends say. Its a waste of time. But they dont realize one important thing. Im no

3、t really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!,.,Guided Conversation,No, it doesnt. Yes, I do. No, they arent. Yes, they, are. Old boots and rubbish. Because I never catch anything. On the river. With an empty bag. Give up fishing. Its a waste of

4、time. One important thing. Sitting in a boat and doing nothing at all.,.,Guided Conversation,Fishing is the writers favorite sport. Some unlucky fishermen catch old boots and rubbish. The writer is not so lucky. He never catches anything. He is not really interested in fishing. Sitting in a boat and

5、 doing nothing at all is the only thing that interests him.,.,Pattern Practice,be keen on give up without Congratulations sb. on doing sth.,.,Key Structures,a 动名词可作名词使用，直接作句子的主语，不定式也可以作句子的主语，但是通常用it做形式主语 Driving fast is dangerous. It is dangerous to drive fast. To drive fast is dangerous.(少见) b 紧跟在介

6、词后的动词必须用动名词形式，例如： Hes keen on cycling. Shes afraid of staying late in the shop.,.,Key Structures,c 注意without, after, before+动名词的用法，例如：He left without paying. 比较： I must apologize for interrupting you(此刻) / having interrupted you.(之前) 再比较：After looking/ having looked at his watch, he hurried away. 这里的两种形式没有区别，因为这两个动作有明显的先后。 现在，请比较: He congratulated me on winning/ having won the competition. 这里的doing和having done两种形式含义稍有区别，用winning表示前后两个事情衔接比较紧密，而用having won表示前后两个事情间隔较长。 on +动名词，例如：On hearing the news, she fainted.= When she heard the