How do you make egg timer has into a question?

It's not entirely clear what you mean by "egg timer has." Could you please rephrase your question or provide more context?

For example:

* Are you asking how to turn the phrase "egg timer has" into a grammatically correct question?

* Are you asking how to use an egg timer in a question?

* Are you asking how to incorporate the concept of an egg timer into a question?

Once I understand your meaning, I can help you formulate your question!