He wrote ancient poems using written language.

He wrote an ancient poem using the literary language form.

He exercised every day and became young quickly.

He is good at using irregular verbs.

This mutation has changed the function of the gene.

His voice change came very early, starting at the age of 12.

It's difficult to remember irregular verbs.

This song is characterized by its irregular time, making the rhythm unique.

His art is odd, but that's why I like it.

His behavior was increasing in weirdness.