I can give you several sentences.
An irregular shape is like, when the shape has no even sides.
An arrhythmia is an irregular heartbeat.
That's an irregular heartbeat. Eating unhealthy food can make you irregular. 'To be' is an irregular verb. It would be irregular of an FBI agent to not follow standard protocols. Some astronomers study cosmic irregularities.
you are irregular
Despite having an irregular shape, we still ate the food.
The company closed due to irregular business operations.
Skewed is an irregular adjective because it ends in -ed. An example of a sentence would be, "The results of his test were skewed due to the teacher's mistakes." Or you could say something like, "His conception of religion was skewed."
Your teacher rang the bell is correct.
no
irregular
no
yes