I could patent you could patent she could patent we could patent you could patent they could patent
Forme en V-ing
I could be patenting you could be patenting she could be patenting we could be patenting you could be patenting they could be patenting
Perfect
I could have patented you could have patented she 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 she could have been patenting we could have been patenting you could have been patenting they could have been patenting
Négation
Forme simple
I couldn't patent you couldn't patent she couldn't patent we couldn't patent you couldn't patent they couldn't patent
Forme en V-ing
I couldn't be patenting you couldn't be patenting she couldn't be patenting we couldn't be patenting you couldn't be patenting they couldn't be patenting
Perfect
I couldn't have patented you couldn't have patented she couldn't have patented we couldn't have patented you couldn't have patented they couldn't have patented
Perfect en V-ing
I couldn't have been patenting you couldn't have been patenting she couldn't have been patenting we couldn't have been patenting you couldn't have been patenting they couldn't have been patenting
Forme interrogative
Forme simple
could I patent? could you patent? could she patent? could we patent? could you patent? could they patent?
Forme en V-ing
could I be patenting? could you be patenting? could she be patenting? could we be patenting? could you be patenting? could they be patenting?
Perfect
could I have patented? could you have patented? could she 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 she have been patenting? could we have been patenting? could you have been patenting? could they have been patenting?
Forme interro-négative
Forme simple
couldn't I patent? couldn't you patent? couldn't she patent? couldn't we patent? couldn't you patent? couldn't they patent?
Forme en V-ing
couldn't I be patenting? couldn't you be patenting? couldn't she be patenting? couldn't we be patenting? couldn't you be patenting? couldn't they be patenting?
Perfect
couldn't I have patented? couldn't you have patented? couldn't she have patented? couldn't we have patented? couldn't you have patented? couldn't they have patented?
Perfect en V-ing
couldn't I have been patenting? couldn't you have been patenting? couldn't she have been patenting? couldn't we have been patenting? couldn't you have been patenting? couldn't they have been patenting?