sit 和 seat 的区别.unfold 的用法,意思

(1)sit是不及物动词,后面无宾语,而seat意为“使.就坐”,是及物动词,后面接宾语.如：I sit here I am seated here
(2）unfold.及物动词 vt. 1.展开,摊开;打开
I unfolded the letter and read it.
我打开信读了起来.
2.显露;表露;呈现
She unfolded to him her plan for the future.
她向他表露她未来的计划.
不及物动词 vi.
1.展开;展示
2.显露;呈现
A beautiful view unfolded before us.
我们面前呈现出一派美丽景色.

你好，
sit，动词“坐”
seat，名词“座位”。
(也可以用作动词，一般用被动表坐的状态。He was seated near the door.)
sit down = take/have a seat
unfold，及物动词，后接物。“打开”