English verb conjugation
CAN PROTOTYPE

Regular verb: prototype - prototyped - prototyped

Affirmation

Simple form	V-ing form
I can prototype you can prototype he can prototype we can prototype you can prototype they can prototype	I can be prototyping you can be prototyping he can be prototyping we can be prototyping you can be prototyping they can be prototyping
Perfect	V-ing perfect
I can have prototyped you can have prototyped he can have prototyped we can have prototyped you can have prototyped they can have prototyped	I can have been prototyping you can have been prototyping he can have been prototyping we can have been prototyping you can have been prototyping they can have been prototyping

Negation

Simple form	V-ing form
I cannot prototype you cannot prototype he cannot prototype we cannot prototype you cannot prototype they cannot prototype	I cannot be prototyping you cannot be prototyping he cannot be prototyping we cannot be prototyping you cannot be prototyping they cannot be prototyping
Perfect	V-ing perfect
I cannot have prototyped you cannot have prototyped he cannot have prototyped we cannot have prototyped you cannot have prototyped they cannot have prototyped	I cannot have been prototyping you cannot have been prototyping he cannot have been prototyping we cannot have been prototyping you cannot have been prototyping they cannot have been prototyping

Interrogative form

Simple form	V-ing form
can I prototype? can you prototype? can he prototype? can we prototype? can you prototype? can they prototype?	can I be prototyping? can you be prototyping? can he be prototyping? can we be prototyping? can you be prototyping? can they be prototyping?
Perfect	V-ing perfect
can I have prototyped? can you have prototyped? can he have prototyped? can we have prototyped? can you have prototyped? can they have prototyped?	can I have been prototyping? can you have been prototyping? can he have been prototyping? can we have been prototyping? can you have been prototyping? can they have been prototyping?

Interro-negative form

Simple form	V-ing form
can I not prototype? can you not prototype? can he not prototype? can we not prototype? can you not prototype? can they not prototype?	can I not be prototyping? can you not be prototyping? can he not be prototyping? can we not be prototyping? can you not be prototyping? can they not be prototyping?
Perfect	V-ing perfect
can I not have prototyped? can you not have prototyped? can he not have prototyped? can we not have prototyped? can you not have prototyped? can they not have prototyped?	can I not have been prototyping? can you not have been prototyping? can he not have been prototyping? can we not have been prototyping? can you not have been prototyping? can they not have been prototyping?