What are the two traits of irregular verbs?

Yes, because it is adding "en" to it. Written is the past participle of write write / wrote / written. They write everyday. They wrote yesterday. They have written everyday. Write is an irregular...

You never chose whether or not you are going to use a verb or irregular verb. Look at what you are trying to say, then pick the verb that fits the sentence. The verb may or may not be irregular.

Can is an irregular verb the past tense is could

Most of the oldest and commonest verbs in English, like be and go, take and have, are called "strong," or irregular verbs, because they do not simply add -ed to the stem to make the past tense, as...

jump, slip, run, swim, and more