可以理解非谓语动词就是分词么？

可以理解非谓语动词就是分词么？是不是所有的分词形式都算是非谓语动词

不能。非谓语动词包含现在分词，过去分词，动词不定式和动名词。

【非谓语动词的特征】 1 如果非谓语动词是及物动词，后面须跟宾语。 　studying english is my favorite. 　学习英语是我的爱好。（studying 后跟宾语） 　to help him is my duty. 　帮助他是我的责任。（help 后跟宾语） 2 非谓语动词可以带有自己的状语或逻辑主语。 　working under such a condition is terrible. 　在这样的环境下工作太可怕了。(under such a condition 是 working 的状语) 　it's too difficult for him to master english in such a short time. 　他在这么短的时间内掌握英语太难了。（for him 作不定式的逻辑主语） 3 非谓语动词仍有语态和时态的变化。 　i am sorry to have kept you waiting long. 　对不起让你久等了。（to have kept...是不定式的完成形式） 　seen from the mountain, the city looks much more beautiful. 　从山上看，这座城市美丽多了。（seen from...是分词的被动形式） 4 非谓语动词在句中可以当成名词或者形容词来使用。 　our coming made him happy. 　我们的到来使他很高兴。（coming 起名词作用） 　there are two big swimming pools here. 　这儿有两个大型游泳池。(swimming 起形容词作用) 【非谓语动词的形式变化】 1.不 定 式 主 动 被 动 　　一般 to write to be written 　　进行 to be writing 　　完成 to have written to have been written 　　完成进行 to have been writing 2.现 在 分 词 主 动 被 动 　　一般 writing being written 　　完成 having written having been written 　　过去分词一般 written 3.动 名 词 主 动 被 动 　　一般 writing being written 　　完成 having written having been written