The regular forms are possible for them but they are less common.

For other words (such as dreamed, leaned, and learned) the regular forms are somewhat more common.

Looking over their own troops, they saw mixed masses slowly getting into regular form.

This created the odd problem that he could not identify himself without changing back to his regular form.

The more regular a person's form and features, the more selfish they were!

Marrow Bones resumed his regular form and went to the other side.

Electra was back to her regular form, and skipping like a child again.

Angelina took a leadership role in the small group and began to organize their lives into a more regular form.

The hexateron is the regular form in the A family.

I couldn't get the little ones on the regular forms.