I could patent you could patent he could patent we could patent you could patent they could patent
Forme en V-ing
I could be patenting you could be patenting he could be patenting we could be patenting you could be patenting they could be patenting
Perfect
I could have patented you could have patented he could have patented we could have patented you could have patented they could have patented
Perfect en V-ing
I could have been patenting you could have been patenting he could have been patenting we could have been patenting you could have been patenting they could have been patenting
Négation
Forme simple
I could not patent you could not patent he could not patent we could not patent you could not patent they could not patent
Forme en V-ing
I could not be patenting you could not be patenting he could not be patenting we could not be patenting you could not be patenting they could not be patenting
Perfect
I could not have patented you could not have patented he could not have patented we could not have patented you could not have patented they could not have patented
Perfect en V-ing
I could not have been patenting you could not have been patenting he could not have been patenting we could not have been patenting you could not have been patenting they could not have been patenting
Forme interrogative
Forme simple
could I patent? could you patent? could he patent? could we patent? could you patent? could they patent?
Forme en V-ing
could I be patenting? could you be patenting? could he be patenting? could we be patenting? could you be patenting? could they be patenting?
Perfect
could I have patented? could you have patented? could he have patented? could we have patented? could you have patented? could they have patented?
Perfect en V-ing
could I have been patenting? could you have been patenting? could he have been patenting? could we have been patenting? could you have been patenting? could they have been patenting?
Forme interro-négative
Forme simple
could I not patent? could you not patent? could he not patent? could we not patent? could you not patent? could they not patent?
Forme en V-ing
could I not be patenting? could you not be patenting? could he not be patenting? could we not be patenting? could you not be patenting? could they not be patenting?
Perfect
could I not have patented? could you not have patented? could he not have patented? could we not have patented? could you not have patented? could they not have patented?
Perfect en V-ing
could I not have been patenting? could you not have been patenting? could he not have been patenting? could we not have been patenting? could you not have been patenting? could they not have been patenting?