Question

英语语法，一个句子逗号后动词应该加什么形式，详细点，最好有例子，求高手解答！

Answer 1

一句子加逗号后接非限制性定语从句 1. My friend showed me round the town, which was very kind of him. (逗号后接了which引导的非限制性定语从句)
2. The man pulled out of a gold watch, the hands of which (whose hands) were made of small diamonds. (逗号后接了of which引导的非限制性定语从句)
3. They will fly to Kunming, where they will stay for two or three days. (逗号后接了where引导的非限制性定语从句)。 二句子加逗号后接分词短语 句子加逗号后接分词短语且常是现在分词短语，表主动进行做伴随或结果。
如 1. The little girl lied on the playground, looking into the sky. (逗号后接现在分词短语表伴随状语)
2. The child fell, striking his head against the door.(逗号后接现在分词短语作结果状语表自然而然的结果。)
三句子加逗号后接不定式短语 句子加逗号后接不定式短语作结果状语，表未预料到的结果。如
1. He hurried to the station, only to find the train had already gone. (逗号后接不定式短语作结果状语表出人意料的结果)
2. Lily’s mobile phone was left in a taxi accidentally, never to be found again. (逗号后接不定式短语作结果状语表出人意料的结果)
四句子加逗号后接形容词或形容词短语 句子加逗号后接形容词或形容词短语作伴随状语。如 1. We reached the temple, tired and hungry. 我们又累又饿地到了寺庙。
2. The earth is a mysterious planet, filled with many mysterious stories. 地球是一个神奇的星球充满了神秘的故事。 另外注意下面的句子与上面句子的区别 She came up looked at , hugged me and cried. (用and 连接了一系列的谓语动词。前面用逗号连接，最后用and 连接) 总而言之一个句子加逗号后后面的成分只能用非限制性定语从句、分词短语、不定式短语和形容词或形容词短语绝不能用逗号来连接两个句子。

Answer 2

逗号前面有时是插入语，把插入语去掉，看看剩下的部分的谓语动词和主语是什么关系。比如：Pausanias,who was a Greek writer about 2000 years ago,has come on a magical journey on March 18th ,2007 to find out about the prsent day Olympic Games这时用现在完成时。如果逗号后面有主语，就看句子该用什么时态最好，那么动词就用什么时态，如果逗号前后没有连词“and ,but,等”逗号前面有一个谓语动词，那么逗号后面的动词用非谓语表示，如果逗号后面紧跟的动词跟句子中的主语呈主动关系的话就用动词的ing形式，如果是被动关系的话，就用动词的过去式,应该对吧！呵呵！

Answer 3

加 ing形式，表示伴随性状态

The teacher entered the classroom，handing a book
那老师（手持书本）进入了教室。

求采纳！谢谢
【俊狼猎英】