English verb conjugation
CAN PATENT

Regular verb: patent - patented - patented

Affirmation

Simple form	V-ing form
I can patent you can patent he can patent we can patent you can patent they can patent	I can be patenting you can be patenting he can be patenting we can be patenting you can be patenting they can be patenting
Perfect	V-ing perfect
I can have patented you can have patented he can have patented we can have patented you can have patented they can have patented	I can have been patenting you can have been patenting he can have been patenting we can have been patenting you can have been patenting they can have been patenting

Negation

Simple form	V-ing form
I can't patent you can't patent he can't patent we can't patent you can't patent they can't patent	I can't be patenting you can't be patenting he can't be patenting we can't be patenting you can't be patenting they can't be patenting
Perfect	V-ing perfect
I can't have patented you can't have patented he can't have patented we can't have patented you can't have patented they can't have patented	I can't have been patenting you can't have been patenting he can't have been patenting we can't have been patenting you can't have been patenting they can't have been patenting

Interrogative form

Simple form	V-ing form
can I patent? can you patent? can he patent? can we patent? can you patent? can they patent?	can I be patenting? can you be patenting? can he be patenting? can we be patenting? can you be patenting? can they be patenting?
Perfect	V-ing perfect
can I have patented? can you have patented? can he have patented? can we have patented? can you have patented? can they have patented?	can I have been patenting? can you have been patenting? can he have been patenting? can we have been patenting? can you have been patenting? can they have been patenting?

Interro-negative form

Simple form	V-ing form
can't I patent? can't you patent? can't he patent? can't we patent? can't you patent? can't they patent?	can't I be patenting? can't you be patenting? can't he be patenting? can't we be patenting? can't you be patenting? can't they be patenting?
Perfect	V-ing perfect
can't I have patented? can't you have patented? can't he have patented? can't we have patented? can't you have patented? can't they have patented?	can't I have been patenting? can't you have been patenting? can't he have been patenting? can't we have been patenting? can't you have been patenting? can't they have been patenting?