最好以英语例句方式剖析,不要说好多中文字去概念,很难懂,或者用我的例句.doingsth.作时间状语：﹡Seeingmyparentswavinginthecrowd,Iwentrunningtothem.(Seeingmyparentswavinginthecrowd,)能不能把前面

Question

最好以英语例句方式剖析,不要说好多中文字去概念,很难懂,或者用我的例句.
doing sth.作时间状语：
﹡Seeing my parents waving in the crowd,I went running to them.
(Seeing my parents waving in the crowd,)能不能把前面的现在分词形式放在后面I went running to them
I went running to them,seeing my parents waving in the crowd
﹡Crossing the road,the old man was knocked over by a car.
=When he was crossing the road,the old man was knocked over by a car.
能不能把前面的现在分词形式Crossing the road,放在后面
the old man was knocked over by a car,Crossing the road
﹡(When) Hearing the news,he got frightened.
= When he heard the news,he got frightened.
能不能把前面的现在分词形式Hearing the news,放在后面
he got frightened,Hearing the news.
诸如此类
﹡
Having eaten his dinner,the boy rushed out.
﹡Hearing their teacher's voice,the pupils stopped talking at once.
﹡Having received his letter,I decided to write back.

Answer 1

如果要把作状语的现在分词放在后面,那最好在分词前加个连词并去掉,如：i went running to them when seeing my parents waving in the crowd.the old man was knocked over by a car when Crossing the road.
分词放在后面也行,但不多见.比如2013年全国2的第5题：i got to the office earlier that day,______the 7:30 train from Paddington.
A.caught B.to ahve caught C.to catch D.having caught