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...
The easy way to recognize a linking verb is that a linking verb acts as an equals sign, the object is a form of the subject (Mary is my sister. Mary=sister); or the subject becomes the object (My...
Well it is sorta a helping words some people count it as helping verb and some count as verbs so it depends on your tutor or teacher but i count as helping