现在分词作状语主句用什么时态好像所有的例句里面的主句时态都是过去式,没有现在式或现在进行时.

现在分词作状语主句用什么时态好像所有的例句里面的主句时态都是过去式,没有现在式或现在进行时.
现在分词作状语主句用什么时态
好像所有的例句里面的主句时态都是过去式,没有现在式或现在进行时.

现在分词作状语主句用什么时态好像所有的例句里面的主句时态都是过去式,没有现在式或现在进行时.
现代分词做状语从句一般表原因,伴随,肯定是写过去发生的事,是对已有的事进行描述,主句肯定用过去式.主句用现在式或现在进行时都是用在口语中,还会用分词做从句吗?

个人看法：不限时态。
例如：I often sit here, thinking about something.

1. 分词作状语实际把
简化。简化的条件：其
一定要与主句的主语保持一致。
While he was reading the book, he nodded from time to time.
----Reading the book, he nodded from time to time.
Because he was shy, he didn’t ...

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1. 分词作状语实际把
简化。简化的条件：其
一定要与主句的主语保持一致。
While he was reading the book, he nodded from time to time.
----Reading the book, he nodded from time to time.
Because he was shy, he didn’t come to the party.
----Being shy, he didn’t come to the party.
As the book is written in simple English, the book is easy to read.
----Written in simple English, the book is easy to read.
2. 分词作状语时可分为以下几种形式：
* doing ： 用来表示主动，且前后动作同时进行。
Returning home later, my friend learned that the police had been to the flat.
* having done: 用来表示主动,且动作发生在主句之前。
Having seen the film before, I decided not to see it again.
* being done: 用来表示被动,且前后动作同时进行。
Being questioned by the police, he felt frightened.
* done: 用来表示被动且完成
Destroyed in the storm, the
will be rebuilt.
* having been done: 用来表示被动，而且强调动作持续 一段时间或次数。
Having been defeated three times, he had to
.
* 否定形式： not/ never + 分词结构
Not studying hard, he didn’t pass the test.
Never having taken a plane before, he was nervous.
3. 分词作状语如果前后主语一致可简化时间、条件、原因、结果和伴随等
。
(条件)
If you work harder, you will do better in the exam next time.
---- Working hard, you will do better in the exam next time.
（时间）
After I did my homework, I went back home.
----Having done my homework, I went back home.
(伴随）
He hurried to the station and hoped to catch the last train.
---- He hurried to the station, hoping to catch the last train.。
(原因)
Because my friend was frightened of losing his job, he said nothing to the police.
----Frightened of losing his job, my friend said nothing to the police.
(结果)
His parents were killed in the SARS epidemic and left him an
.
---- His parents were killed in the SARS epidemic, leaving him an
.

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