Answer: Intransitive verbs cannot be changed to passive verbs.
Step-by-step explanation:
Intransitive verbs are verbs that do not have a direct object. They do not require a noun or pronoun to complete their meaning. Examples of intransitive verbs are sleep, die, arrive, laugh, etc. Since these verbs do not have a direct object, there is no noun or pronoun to become the subject of the sentence in the passive voice.
On the other hand, transitive verbs are verbs that have a direct object, they require a noun or pronoun to complete their meaning. Examples of transitive verbs are eat, write, throw, etc. These verbs can be changed to passive voice by making the object of the sentence the subject, and adding the appropriate form of the verb 'to be' and the past participle of the main verb.
In summary, intransitive verbs cannot be changed to passive verbs because they do not have a direct object to become the subject of the sentence in passive voice.