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 can't prototype you can't prototype he can't prototype we can't prototype you can't prototype they can't prototype	I can't be prototyping you can't be prototyping he can't be prototyping we can't be prototyping you can't be prototyping they can't be prototyping
Perfect	V-ing perfect
I can't have prototyped you can't have prototyped he can't have prototyped we can't have prototyped you can't have prototyped they can't have prototyped	I can't have been prototyping you can't have been prototyping he can't have been prototyping we can't have been prototyping you can't have been prototyping they can't 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't I prototype? can't you prototype? can't he prototype? can't we prototype? can't you prototype? can't they prototype?	can't I be prototyping? can't you be prototyping? can't he be prototyping? can't we be prototyping? can't you be prototyping? can't they be prototyping?
Perfect	V-ing perfect
can't I have prototyped? can't you have prototyped? can't he have prototyped? can't we have prototyped? can't you have prototyped? can't they have prototyped?	can't I have been prototyping? can't you have been prototyping? can't he have been prototyping? can't we have been prototyping? can't you have been prototyping? can't they have been prototyping?