回答如下：

▲可以从2个方面去理解

(1) 现在分词作状语

He came running =He came by means of running（状语结构）

中文意思：他是以跑的方式来的.

=He was running when he came.（双重谓语结构）

中文意思；他是跑来的。

中文意思：他来的过程中一直都在跑

(2) 双重谓语结构（动词+分词结构）

He came running.

=He was running when he came.

中文意思：他是跑着过来的.

▲动词＋分词（短语）(包括现在分词和过去分词）

(1) They lay there chatting．

＝They were chatting when they lay there．

他们躺在那里聊天。

(2) He wandered wondering．

＝He was wondering when he wandered．

漫步时，他在冥思。

(3) He came home exhausted．

＝He was exhausted when he came home．

他回家时已是筋疲力尽。