They have published all my article. into passive voice

That sentence change into passive voice would be:

All my article has been published.

Explanation:

To change a sentence into the passive voice, we must first find the direct object of the verb and use it as the new subject. In the original sentence, the direct object is "all my article".

Then, we identify the verb and its tense. We maintain the tense, add the verb "to be" as an auxiliary, and change the main verb into its past participle voice. In this case, we have "have published", which is present perfect. The main verb is "published", and it is already a past participle.

Finally, the subject of the original sentence becomes the agent of the passive voice. It follows "by" and appears at the end of the sentence. However, when the original subject is "they", it is usually omitted when transformed into the agent.

With all that in mind, we can easily change the sentence:

They have published all my article.

(s)                (v)                 (od)

⇅

All my article has been published.      (by them)

       (new s)            (new v)               (agent omitted)