Indicative
Present Indefinite
I call upon
you call upon
he/she/it calls upon
we call upon
you call upon
they call upon
Present Continuous
I am calling upon
you are calling upon
he/she/it is calling upon
we are calling upon
you are calling upon
they are calling upon
Present Perfect
I have called upon
you have called upon
he/she/it has called upon
we have called upon
you have called upon
they have called upon
Present Perfect Continuous
I have been calling upon
you have been calling upon
he/she/it has been calling upon
we have been calling upon
you have been calling upon
they have been calling upon
Past Indefinite
I called upon
you called upon
he/she/it called upon
we called upon
you called upon
they called upon
Past Continuous
I was calling upon
you were calling upon
he/she/it was calling upon
we were calling upon
you were calling upon
they were calling upon
Past Perfect
I had called upon
you had called upon
he/she/it had called upon
we had called upon
you had called upon
they had called upon
Past Perfect Continuous
I had been calling upon
you had been calling upon
he/she/it had been calling upon
we had been calling upon
you had been calling upon
they had been calling upon
Future Indefinite
I will call upon
you will call upon
he/she/it will call upon
we will call upon
you will call upon
they will call upon
Future Continuous
I will be calling upon
you will be calling upon
he/she/it will be calling upon
we will be calling upon
you will be calling upon
they will be calling upon
Future Perfect
I will have called upon
you will have called upon
he/she/it will have called upon
we will have called upon
you will have called upon
they will have called upon
Future Perfect Continuous
I will have been calling upon
you will have been calling upon
he/she/it will have been calling upon
we will have been calling upon
you will have been calling upon
they will have been calling upon
Conditional
Conditional Present
I would call upon
you would call upon
he/she/it would call upon
we would call upon
you would call upon
they would call upon
Conditional Present Continuous
I would be calling upon
you would be calling upon
he/she/it would be calling upon
we would be calling upon
you would be calling upon
they would be calling upon
Conditional Perfect
I would have called upon
you would have called upon
he/she/it would have called upon
we would have called upon
you would have called upon
they would have called upon
Conditional Perfect Continuous
I would have been calling upon
you would have been calling upon
he/she/it would have been calling upon
we would have been calling upon
you would have been calling upon
they would have been calling upon