牛津实用英语语法:254 不定式的进行式

　　A 形式

　　to be+现在分词：

　　He seems to be following us.

　　他好像在跟着我们。

　　B 用法

　　不定式的进行式可用于：

　　1 助动词之后：

　　Theyll be wondering where you are.

　　他们会纳闷你在哪里。

　　He may/might be watching TV.

　　He cant/couldnt be watching TV.

　　他可能在看电视。

　　他不会在看电视。

　　There are no programmes today because of the strike.

　　由于罢工，今天没有节目。(否定的推论)

　　He must be coming by bus.

　　他一定是乘公共汽车来。(推论)

　　You shouldnt be reading a novel.You should be reading a textbook.

　　现在你不该看小说，你应该看课本。

　　2 appear，happen，pretend，seem之后：

　　He appears/seems to be living in the area.相当于：

　　It appears/seems that he is living in the area.

　　(看来)他似乎就住在这一带。

　　He appeared/seemed to be living in the area.相当于：

　　It appeared/seemed that he was living in the area.

　　当时(看来)他似乎就住在那一带。

　　I happened to be standing next to him when he collapsed.相当于：

　　It happened that I was standing next to him when he collapsed.

　　他倒下的时候我恰巧站在他旁边。

　　He pretended to be looking for a book.相当于：

　　He pretended that he was looking for a book.

　　他假装在找书。

　　3 hope和promise之后，或agree，arrange，decide，determine/be determined，plan，undertake之后，但用于hope和promise后更常见：

　　I hope/hoped to be earning my living in a years time.相当于：

　　I hope I will/I hoped I would be earning

　　我希望在一年内能自食其力。

　　determine/be determined，plan等词可代替上面句子中的hope，然而意思稍有不同：

　　I promised to be waiting at the door when he came out.

　　我答应在门口一直等到他出来。

　　agree， arrange， decide， determine/be determined， plan， under-take等词可代替上面句子中的promise，意思各不相同。

　　4 在被动时态的 believe， consider， suppose， think等之后：He is believed to be living in Mexico.

　　据信他现在住在墨西哥。