can prototype
Regular verb: prototype - prototyped- prototyped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?