A 形式
to be+目前分词：
He seems to be following us．
他仿佛在跟着大家。
B 使用方法
不定式的进行式可用于：
1 助动词之后：
Theyll be wondering where you are．
他们会纳闷你在哪儿。
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．
因为罢工，今天没节目。（否定的推论）
He must be coming by bus．
他肯定是乘公共汽车来。（推论）
You shouldnt be reading a novel．You should be reading a textbook．
目前你不该看小说，你应该看课本。
2 appear，happen，pretend，seem之后：
He appears/seems to be living in the area．等于：
It appears/seems that he is living in the area．
（看来）他好像就住在这一带。
He appeared／seemed to be living in the area．等于：
It appeared／seemed that he was living in the area．
当时（看来）他好像就住在那一带。
I happened to be standing1 next to him when he collapsed2．等于：
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．等于：
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 determined3，plan，undertake之后，但用于hope和promise后更容易见到：
I hope／hoped to be earning my living in a years time．等于：
I hope I will／I hoped I would be earning
我期望在一年内能自力更生。
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．
据信他目前住在墨西哥。（参见第306节。）
