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▲高考英语语法必考知识点：动词不定式的完成进行式
形式
to have been + 现在分词
He seems to have been spying for both sides.
他似乎一直在为两方面搞秘密情报。
▲高考英语语法必考知识点：动词不定式的完成进行式
用法
只要用于助动词之后和appear，seem之后，但也可以用在happen，pretend以及believe，know，report，say，understand的被动式之后：
He appears to have been waiting a long time.相当于：
It appears that he has been waiting a long time.
看来他已经等了很久了。
He pretended to have been studying. 相当于：
He pretended that he had been studying.
他假装一直在学习的样子。
▲高考英语语法必考知识点：动词不定式的完成进行式
句型用法
在There be句型中的动词不定式：
For example one,There are too much homework to write.
two,There are students writing too much homework.
▲高考英语语法必考知识点：动词不定式的完成进行式
强调动作在一段时间内反复发生。
We have been seeing quite a lot of each other recently.
最近我们常常见面.
Where have you been We have been looking for you everywhere.
你刚才在哪儿我们一直在到处找你呢!
He has been saying that for years.
这话他已经说了好几年了.
It has been raining every day this month.
这个月天天下雨.
2、强调动作在长时间内持续不断.
All these years they have been contributing articles to our magazine.
这些年来,创立们一直为我们杂志写稿.
She has been writing the letter since four o”clock in the afternoon.
从下午四点钟到现在,她一直在写信.
We have been studying in this school for three years.
我们一直在这所学校学习了三年.
How long have you been watching TV
你看了多久电视了
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2017年高考英语语法必考知识点：动词不定式的完成式
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2017年高考英语语法必考知识点：动词不定式的特殊句型