What is the mood of verb in this sentence The old shack looked as if it was about to collapse.?

The mood of the verb "looked" in the sentence "The old shack looked as if it was about to collapse" is indicative.

Here's why:

* Indicative mood is used to state a fact or make a statement. In this sentence, the sentence is stating a fact about the shack's appearance.

* Subjunctive mood is used to express a wish, doubt, or possibility. While the sentence implies a possibility (the shack collapsing), the verb "looked" itself is simply describing the shack's appearance, not expressing a wish or doubt.

* Imperative mood is used to give a command or make a request. This is not applicable in the sentence.

Therefore, "looked" is in the indicative mood because it is stating a fact about the shack's appearance.