Arya climbed up on the window and sat beside him, to a chorus of thuds and grunts from the yard below.
And he was finding that he had a man’s thirst, to the raucous delight of the youths around him, who urged him on every time he drained a glass.
这两个句子里不定式引导的是什么成分,是做状语么,第二个句子里Who引导的又是什么成分呢?