Is i am watching a movie Declarative sentence​

Yes

Explanation:

Because declarative sentence does not ask a question ("Do you like cheese?"), give an order (e.g., "Pass the cheese."), or express strong emotion (e.g. "I hate cheese!"). Declarative sentences simply make a statement (or a declaration). They pass on information. A declarative sentence always ends with a period (full stop).

a declarative sentence is a sentence that makes a statement, provides a fact, offers an explanation, or conveys information. These types of sentences are also known as declarative statements. A declarative sentence is the most common type of sentence in the English language

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