ThebrokenLaptop is of no use. Here, the underlined part is an example of:

সঠিক উত্তর হবে: This is an example of Past participle. 

Participle:

It is the form of a verb that usually ends in "ed" or "ing" and is used as an adjective:
- Participle একই সাথে Verb ও Adjective এর কাজ করে। 

In the sentences "He's sleeping" and "I've already eaten", the words "sleeping" and "eaten" are both participles.

Participle মূলত: তিন প্রকার: 
1. Present Participle. Ex: Do not disturb a sleeping dog. (verb+ing)
2. Past Participle. Ex: This is a book written by Charles Dickens. (past form of verb)
3. Perfect Participle. Ex: Having eaten rice, he went to bed. (having+Past participle form of a verb)