一个关于英语的问题

and 连接的前后两部分要一致，这个原则是在一定情况下而谈的，当and连接两个同性动作词，两个性质本性，两个物质，两个抽象概念时，前后需保持一致。例如：
In your arms I feel safe and sound. 连接两个形容词。
She is walking and dreaming. 连接两个同性词。
The dog looks as white as snow and as timid as mice. 连接两个短语。
而你所给出的那两句话：
as we lay relaxed and dreaming.
relaxed 是形容词，dreaming是动名词，都是有lay (此处是系动词)引出，中间用and连接是正确的，意思是，“放松的躺下来进入梦乡”。根据我的译文你也看出来，and 前后不是一致的事物。
Soon I was back on my feet again and following him.
back on my feet again 和 following him 都作was的表语，两个部分属于承接关系，先“站稳脚步”再“跟随他人”可以拆分为两句话：Soon I was back on my feet again. And then I was following him.

第一个句子，相当于：
as we lay relaxed and (lay) dreaming，这里relaxed和dreaming都是分词作lay的状语
第二个句子，相当于：
Soon I was back on my feet again and (was) following him.
这里的following him和back on my feet一样，都是作为was的表语。
and 连接的两个并列成分，假如动词有重复，一般都是省略的

一般情况下，两者可以互换。如： He started learning /to learn English when he was only three. 他在只有三岁的时候就开始学习英语了。 但在下列三种