The Passive Voice is formed by means of the auxiliary verb to be in the required form and Participle II of the notional verb.
(a) The Present, Past and Future Indefinite Passive are formed by means of the Present, Past and Future Indefinite of the auxiliary verb to be and Participle II of the notional verb.
Present Indefinite
Passive
Past Indefinite
Passive
Future Indefinite
Passive
I am invited
I was invited
I shall be invited
He is invited
He was invited
He will be invited
She is invited
She was invited
She will be invited
We are invited
We were invited
We shall be invited
You are invited
You were invited
You will be invited
They are invited
They were invited
They will be invited
(b) The Present, Past and Future Perfect Passive are formed by means of the Present, Past and Future Perfect of the auxiliary verb to be and Participle II of the notional verb.
Present Perfect
Passive
Past Perfect
Passive
Future Perfect
Passive
I have been invited
I had been invited
I shall have been invited
He has been invited
He had been invited
He will have been invited
She has been invited
She had been invited
She will have been invited
We have been invited
We had been invited
We shall have been invited
You have been invited
You had been invited
You will have been invited
They have been invited
They had been invited
They will have been invited
(c) The Present Continuous and the Past Continuous Passive are formed by means of the Present Continuous and the Past Continuous of the auxiliary verb to be and Participle II of the notional verb.
Present Continuous Passive
Past Continuous Passive
I am being invited
I was being invited
He is being invited
He was being invited
She is being invited
She was being invited
We are being invited
We were being invited
You are being invited
You were being invited
They are being invited
They were being invited
The Future Continuous, the Present Perfect Continuous, the Past Perfect Continuous and the Future Perfect Continuous are not found in the Passive Voice.