Question

highlight the subordinating conjunction (\swabi\) in the sentence.
phineas flynn and i are going to the zoo since tomorrow is a holiday.

Explanation:

A subordinating conjunction (SWABI) introduces a subordinate clause and shows the relationship between the main clause and the subordinate clause. In the sentence "Phineas Flynn and I are going to the zoo since tomorrow is a holiday", "since" is the subordinating conjunction as it introduces the subordinate clause "tomorrow is a holiday" and explains the reason for the action in the main clause.

Answer:

since