这里是分词做原因状语。Having eaten too much, he couldn’t go to sleep.由于他吃得太多了，导致他无法入睡。——————————————分词作状语时，常可以表达伴随、原因、结果、时间、条件、让步情况，如：1.表伴随The children ran out of the room, laughing and talking merrily.2.表原因 Not knowing her address, we couldn’t get in touch with her.3.表结果 His parents were killed in the accident, leaving him an ...
