Present
I intervene
you intervene
he intervenes
we intervene
you intervene
they intervene

Perfect
I have intervened
you have intervened
he has intervened
we have intervened
you have intervened
they have intervened

Past
I intervened
you intervened
he intervened
we intervened
you intervened
they intervened

Pluperfect
I had intervened
you had intervened
he had intervened
we had intervened
you had intervened
they had intervened

Future
I will intervene
you will intervene
he will intervene
we will intervene
you will intervene
they will intervene

Future perfect
I will have intervened
you will have intervened
he will have intervened
we will have intervened
you will have intervened
they will have intervened

Present
I intervene
you intervene
he intervene
we intervene
you intervene
they intervene

Present
I have intervened
you have intervened
he have intervened
we have intervened
you have intervened
they have intervened

Imperfect
I intervened
you intervened
he intervened
we intervened
you intervened
they intervened

Pluperfect
I had intervened
you had intervened
he had intervened
we had intervened
you had intervened
they had intervened

Present
I would intervene
you would intervene
he would intervene
we would intervene
you would intervene
they would intervene

Perfect
I would have intervened
you would have intervened
he would have intervened
we would have intervened
you would have intervened
they would have intervened

you intervene
we Let's intervene
you intervene

Present
I am intervening
you are intervening
he is intervening
we are intervening
you are intervening
they are intervening

Perfect
I have been intervening
you have been intervening
he has been intervening
we have been intervening
you have been intervening
they have been intervening

Past
I was intervening
you were intervening
he was intervening
we were intervening
you were intervening
they were intervening

Pluperfect
I had been intervening
you had been intervening
he had been intervening
we had been intervening
you had been intervening
they had been intervening

Future
I will be intervening
you will be intervening
he will be intervening
we will be intervening
you will be intervening
they will be intervening

Future perfect
I will have been intervening
you will have been intervening
he will have been intervening
we will have been intervening
you will have been intervening
they will have been intervening

Present
I would be intervening
you would be intervening
he would be intervening
we would be intervening
you would be intervening
they would be intervening

Perfect
I would have been intervening
you would have been intervening
he would have been intervening
we would have been intervening
you would have been intervening
they would have been intervening