guest是介詞嗎

不是介詞，guest，是名詞詞性，意思是客人，例如：

1、Guests are requested to vacate their rooms by noon on the day of departure.房客務請在離開之日的中午以前騰出房間。

2、At that time my mother took in paying guests.那時候，我媽媽接待房客。

3、Apparently， many guests had felt and seen a variety of things.顯然，很多房客感覺到或看到了一些東西。