The past participle of an automatic word after the verb be can not be regarded as a passive voice, but as a perfect form, because it refers to the state of the action of an automatic word after completion. There is only one form of the perfect (present) we are talking about now, but in the era of OE (Old English), it is have + object + past participle.
The verbs used in the form of have + object + past participle are mainly other verbs, while automatic words, especially automatic words marked with movement, change, termination, etc., such as come, go, arrive, fall, arise, become, grow, change, die, etc., adopt the form of be + past participle, which is no different from the form of have in meaning.
However, the form of be + past participle of the automatic word Jinan translation company gradually loses power through middleenglish to modern English and is eroded by the form of have. Therefore, when we talk about perfect tense today, we only know the form of havedone.
However, the usage of automatic words in ancient times has not disappeared. Now a few automatic words representing movement and change, such as come, go, arrive, Department, fall, rise, set, growth, still retain the form of be + past participle, and compete with the form of have in usage. The action completed with the form of have and the state completed with the form of be.