What is the main verb of following sentence The coffee mug thati drink out every morning has gone missing?

The main verb in the sentence "The coffee mug that I drink out of every morning has gone missing" is "has gone".

Here's why:

* "has gone" is the verb phrase that indicates the action of the subject "coffee mug".

* "missing" is a participle that acts as an adjective modifying the phrase "has gone". It describes the state of the coffee mug.

Let me know if you have any other sentences you'd like to analyze!