Indicative
Present Indefinite
I co-author
you co-author
he/she/it co-authors
we co-author
you co-author
they co-author
Present Continuous
I am co-authoring
you are co-authoring
he/she/it is co-authoring
we are co-authoring
you are co-authoring
they are co-authoring
Present Perfect
I have co-authored
you have co-authored
he/she/it has co-authored
we have co-authored
you have co-authored
they have co-authored
Present Perfect Continuous
I have been co-authoring
you have been co-authoring
he/she/it has been co-authoring
we have been co-authoring
you have been co-authoring
they have been co-authoring
Past Indefinite
I co-authored
you co-authored
he/she/it co-authored
we co-authored
you co-authored
they co-authored
Past Continuous
I was co-authoring
you were co-authoring
he/she/it was co-authoring
we were co-authoring
you were co-authoring
they were co-authoring
Past Perfect
I had co-authored
you had co-authored
he/she/it had co-authored
we had co-authored
you had co-authored
they had co-authored
Past Perfect Continuous
I had been co-authoring
you had been co-authoring
he/she/it had been co-authoring
we had been co-authoring
you had been co-authoring
they had been co-authoring
Future Indefinite
I will co-author
you will co-author
he/she/it will co-author
we will co-author
you will co-author
they will co-author
Future Continuous
I will be co-authoring
you will be co-authoring
he/she/it will be co-authoring
we will be co-authoring
you will be co-authoring
they will be co-authoring
Future Perfect
I will have co-authored
you will have co-authored
he/she/it will have co-authored
we will have co-authored
you will have co-authored
they will have co-authored
Future Perfect Continuous
I will have been co-authoring
you will have been co-authoring
he/she/it will have been co-authoring
we will have been co-authoring
you will have been co-authoring
they will have been co-authoring
Conditional
Conditional Present
I would co-author
you would co-author
he/she/it would co-author
we would co-author
you would co-author
they would co-author
Conditional Present Continuous
I would be co-authoring
you would be co-authoring
he/she/it would be co-authoring
we would be co-authoring
you would be co-authoring
they would be co-authoring
Conditional Perfect
I would have co-authored
you would have co-authored
he/she/it would have co-authored
we would have co-authored
you would have co-authored
they would have co-authored
Conditional Perfect Continuous
I would have been co-authoring
you would have been co-authoring
he/she/it would have been co-authoring
we would have been co-authoring
you would have been co-authoring
they would have been co-authoring