In came a man with a white beard此句中in的作用本句为完全倒装,为啥在句首

In came a man with a white beard此句中in的作用本句为完全倒装,为啥在句首
In came a man with a white beard此句中in的作用
本句为完全倒装,
为啥在句首

In came a man with a white beard此句中in的作用本句为完全倒装,为啥在句首
因为man的定语太长了,如果顺序的话,整个句子就不平衡,头重脚轻a man with a white beard came in!
in 是一副词,是跟come构成词组,意思为“进来”.