第三章 动词时态

时态问题怎么理解？

• 简单式

• 完成式

• 以简制繁的办法是：把be 动词当作动词，其后的分词则视为形容词补语。* 如果把be 动词抽离出来当作动词看待，那就只剩下用be 动词写的简单式，以及用have been 写的完成式两种状态。

• 分词可视为形容词补语，不放在动词短语里面

结语

1. 把be动词当作动词看，句子就剩下两种时态，简单式与完成式
2. 简单式是以括弧型的时间来表达
3. 完成式是以箭头型的时间来表达
4. be 动词后面的分词当作形容词补语，现在分词有正在进行的意思，过去分词有被动的意思。

1. E.g.So far we have heard nothing from him.
2. At present a new road is being built in that part of the city.
3. Our city has changed a great deal. It doesn't resemble the one of three years ago.
4. When Anna phoned me I had just finished my work and was starting to take a bath.
5. There have been some very bad storms recently.
6. The future price of this stock will be determined by serveal factory.
7. The camera was invented in the 19th century. At that time, most photographers were professionals.
8. The whole area was flooded because it has rained for weeks.
9. By next Sunday you will have stayed with us for three months.
10. We could smell that some one had been smoking