椅

椅

Chair.

The word '椅子' refers to a chair, explicitly defining an object in this sentence.

这是一张椅子。

This is a chair.

Here, '椅子' is used to describe the location of the chair relative to another object, the table.

桌子旁边有一张椅子。

There is a chair next to the table.

In this example, '椅子' is utilized to refer to the specific chair being requested to move, showing its application in instructions.

请你把那张椅子搬过来。

Please move that chair over.