The movie was fascinating.
Here, the word "fascinating" is a/ an -

• The movie was fascinating. Here, the word 'fascinating' is a - Participle.

• প্রদত্ত বাক্যে 'fascinating’ শব্দটি noun "The movie" কে describe করছে।
- বাক্যে 'fascinating' subject complement হিসেবে ব্যবহৃত হয়েছে। অর্থাৎ adjective এর কাজ করছে।
- It is used as an adjective — it tells us what kind of quality the movie has.
- Verb + ing যখন adjective এর কাজ করে তখন তাকে participle বলে।
- তাই, প্রদত্ত sentence টিতে fascinating হলো Present Participle.

• A participle is a verb that ends in -ing (present participle) or -ed, -d, -t, -en, -n (past participle). Participles may function as adjectives, describing or modifying nouns.
- Participle একই সাথে Verb ও Adjective এর কাজ করে।

• Participle মূলত: তিন প্রকার:
1. Present Participle. Ex: Do not disturb a sleeping dog.
2. Past Participle. Ex: This is a book written by Charles Dickens.
3. Perfect Participle. Ex: Having eaten rice, he went to bed.

• উল্লিখিত বাকি অপশনগুলো,
• Gerund:
- Gerund হল এমন একটি শব্দ যা verb + ing যুক্ত হয়ে Noun এর মতো কাজ করে।

• Infinitive:
- Verb এর present form এর আগে to বসিয়ে Infinitive গঠন করা হয়।
- অর্থাৎ, Infinitive = to + verb.

• Finite verb:
- A finite verb is the main verb in a sentence. It’s the root word that drives the rest of the sentence. Almost every verb in the English language can be used as a finite verb as long as it has these qualities in a sentence:
- a subject;
- agreement with the subject;
- a tense (present or past).

Source: A Passage To The English Language S. M. Zakir Hussain.