"Bake" is a regular verb. Its past tense form is "baked," which follows the standard pattern of adding "-ed" to the base form. Regular verbs form their past tense and past participle by following this consistent pattern, unlike irregular verbs, which have unique forms.
"Have" is an irregular verb in English.
It's irregular.
regular or irregular
It's an irregular verb.
It's an irregular verb.
To swim is an irregular verb.
It's an irregular verb.
Ate is an irregular verb.
It's an irregular verb.
By is not a verb, so it is neither regular nor irregular.
Shown is an irregular verb because shown is different to ending in -ed. Does shown end in -ed? No it doesn't end in -ed so which makes it an irregular verb.
irregular