过去分词和现在分词的完成被动式作状语时有什么区别 10. ________ many times, he finally understood it.

问题描述:

过去分词和现在分词的完成被动式作状语时有什么区别 10. ________ many times, he finally understood it.

现在分词完成被动式与过去分词的区别
现在分词的完成被动式有两个特点:一是表示完成,二是表示被动。如:
Having been bitten twice,the postman refused to deliver ourletters unless we chained our dog up.邮递员被狗咬了两次之后要我们把狗拴起来,不然就不给我们送信了。
过去分词的用法也有两个特点:一是表示完成,二是表示被动。所以有时现在分词的完成被动式与过去分词可以表示相同的意思。如:
(Having been) written in haste,the book has many mistakes,这书因写得仓促,所以错误不少。
(Having been)born in America,he is proficient in English由于他是在美国出生的,所以英语很好。
有时虽然所表示的时间概念相同,但有细微区别:
Having been shown the lab,we left,被领着看了实验室后,我们就离开了。
Shown the lab,we left被领着一看完实验室,我们就离开了。(有一种急促感)
[注]以下情况通常用过去分词,而不用现在分词的完成式。
1、过去分词表示先于谓语动同发生的动作外,还可以表示与谓语动词同时(几乎同时)发生的动作,此时不可用现在分词的完成式代替。如:
He came in,followed by his secretary,他走了进来,后面跟着他的秘书。
Convinced that they were going to poison him,he refused to eatanything,他相信他们要毒死他,所以他拒绝进食。
2、当过去分词以表示现在或过去(当时)的状态时,也不可用现在分词的完成式代替。如:
The murderer was brought in,his hands tied behind,凶手被带了进来,双手被绑在后面。
3、当连用具体明确的过去时间状语时,通常也只用过去分词。如:
Built in 1501,the bridge is over 500 yearsold,这座桥建于1501年,已有五百多年的历史。

先填空After thought for a many times.he finally understood it.只是时态的区别呀,举个例子The book have been read by me just now after several days' reading.The book had been read by me before when i was...