The birds sitting on the branches of the tree are quite lovely.
Here, 'sitting' is a/an -

• The birds sitting on the branches of the tree are quite lovely.
- Here, 'sitting' is a - Non-finite verb.

- A non-finite verb is a verb form that does not show tense.
- Most non-finite verbs found in English are infinitives, participles and gerunds.

আলোচ্য বাক্যে,
- ‘sitting’ verb টি কোনো tense নির্দেশ করেনা।
- এটা Present Participle এবং non-finite verb.