非谓语动词的现在分词和现在分词完成式的区别想请问一下,现在分词和现在分词的完成式的区别．主句中的谓语动词表示的动作与非谓语中的动作几乎同时进行,不分先后的时候是用一般式．而有动作先后的时候,非谓语动词在先就用完成式．可是有的语法书上说：当主句的动作与非谓语的动作有明显先后顺序的时候（如果非谓语的动作在先）,那么,非谓语就用完成式．那到底有没有这一说呢?如果有的话,什么样算是明显先后动作呢?

有这么一说，有2个考题，我记不太清了，好像是：
__________ from coughing for a week, he had to give up ________.
A、Suffering, smoking B、Having suffered, smoking
C、Having suffered, to smoke D、Suffering, to smoke
_________ her before, he couldn’t know she was his aunt.
A、Not seeing B、Not having seen C、Having not seen D、Not seen
还有一个to do 不定式的
He is thought to have invented the first telephone

有这个说法
（1）现在分词的主动语态：现在分词主动语态的一般式表示与谓语动词所表示的动作同时发生,完成
式表示的动作在谓语动词所表示的动作之前发生,常作状语.例如：
They went to the park, singing and talking. 他们边唱边说向公园走去.
Having done his homework, he played basket-ball. 做完作业,他开始打篮球.
（2）现在分词的被动语态：一般式表示与谓语动词同时发生的被动的动作,完成式表示发生在谓语动
词之前的被动的动作.
The problem being discussed is very important. 正在被讨论的问题很重要.
Having been told many times, the naughty boy made the same mistake.
被告诉了好几遍,这个淘气的孩子又犯了同一个错误.
（1）一般式：不定式的一般式所表示的动作与谓语动词动作同时发生或发生在谓语动词动作之后,
例如：
I'm glad to meet you.
He seems to know a lot.
We plan to pay a visit.
He wants to be an artist.
The patient asked to be operated on at once.
The teacher ordered the work to be done.
（2）进行式：不定式的进行式所表示的动作与谓语动词动作同时发生,例如：
The boy pretended to be working hard.
He seems to be reading in his room.
（3）完成式：不定式的完成式表示的动作发生在谓语动词动作之前,例如：
I regretted to have told a lie.
I happened to have seen the film.
He is pleased to have met his friend.