அத

In a sentence

• அத எனது நண்பனின் புத்தகம்.

  That is my friend's book.

  Here, 'அத' ('that') is a demonstrative pronoun referring to a distant object.

• அதை நான் பார்த்தேன்.

  I saw that.

  Here, 'அதை' ('that') serves as the object of the verb 'saw' in the sentence.

• அது வெள்ளி நிறத்தில் உள்ளது.

  That is in silver color.

  Here, 'அது' ('that') functions as the subject of the sentence, indicating the topic being discussed.