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。
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。
