Yesterday afternoon set in misty and cold.
谢谢老师！
此句中set的意思是？misty and cold在句中作什么成分？
set in为短语动词。《韦氏高阶》
set in [phrasal verb]
: to begin to be present, seen, etc. — used of something unpleasant or unwanted that often lasts for a long time
The kids should go outside and play before the rain sets in again.
An infection set in after the surgery.
你的句子Yesterday afternoon set in misty and cold. 是个倒装句，yesterday afternoon为时间状语前置，set in为不及物动词作谓语，mist and cold为主语。原句中形容词misty应改为名词mist。句子意思是，昨天下午天开始起雾，气温变冷。
