English verb conjugation
CAN AUTHOR

Regular verb: author - authored - authored

Affirmation

Simple form	V-ing form
I can author you can author she can author we can author you can author they can author	I can be authoring you can be authoring she can be authoring we can be authoring you can be authoring they can be authoring
Perfect	V-ing perfect
I can have authored you can have authored she can have authored we can have authored you can have authored they can have authored	I can have been authoring you can have been authoring she can have been authoring we can have been authoring you can have been authoring they can have been authoring

Negation

Simple form	V-ing form
I cannot author you cannot author she cannot author we cannot author you cannot author they cannot author	I cannot be authoring you cannot be authoring she cannot be authoring we cannot be authoring you cannot be authoring they cannot be authoring
Perfect	V-ing perfect
I cannot have authored you cannot have authored she cannot have authored we cannot have authored you cannot have authored they cannot have authored	I cannot have been authoring you cannot have been authoring she cannot have been authoring we cannot have been authoring you cannot have been authoring they cannot have been authoring

Interrogative form

Simple form	V-ing form
can I author? can you author? can she author? can we author? can you author? can they author?	can I be authoring? can you be authoring? can she be authoring? can we be authoring? can you be authoring? can they be authoring?
Perfect	V-ing perfect
can I have authored? can you have authored? can she have authored? can we have authored? can you have authored? can they have authored?	can I have been authoring? can you have been authoring? can she have been authoring? can we have been authoring? can you have been authoring? can they have been authoring?

Interro-negative form

Simple form	V-ing form
can I not author? can you not author? can she not author? can we not author? can you not author? can they not author?	can I not be authoring? can you not be authoring? can she not be authoring? can we not be authoring? can you not be authoring? can they not be authoring?
Perfect	V-ing perfect
can I not have authored? can you not have authored? can she not have authored? can we not have authored? can you not have authored? can they not have authored?	can I not have been authoring? can you not have been authoring? can she not have been authoring? can we not have been authoring? can you not have been authoring? can they not have been authoring?