I could chrome you could chrome he could chrome we could chrome you could chrome they could chrome
V-ing form
I could be chroming you could be chroming he could be chroming we could be chroming you could be chroming they could be chroming
Perfect
I could have chromed you could have chromed he could have chromed we could have chromed you could have chromed they could have chromed
V-ing perfect
I could have been chroming you could have been chroming he could have been chroming we could have been chroming you could have been chroming they could have been chroming
Negation
Simple form
I couldn't chrome you couldn't chrome he couldn't chrome we couldn't chrome you couldn't chrome they couldn't chrome
V-ing form
I couldn't be chroming you couldn't be chroming he couldn't be chroming we couldn't be chroming you couldn't be chroming they couldn't be chroming
Perfect
I couldn't have chromed you couldn't have chromed he couldn't have chromed we couldn't have chromed you couldn't have chromed they couldn't have chromed
V-ing perfect
I couldn't have been chroming you couldn't have been chroming he couldn't have been chroming we couldn't have been chroming you couldn't have been chroming they couldn't have been chroming
Interrogative form
Simple form
could I chrome? could you chrome? could he chrome? could we chrome? could you chrome? could they chrome?
V-ing form
could I be chroming? could you be chroming? could he be chroming? could we be chroming? could you be chroming? could they be chroming?
Perfect
could I have chromed? could you have chromed? could he have chromed? could we have chromed? could you have chromed? could they have chromed?
V-ing perfect
could I have been chroming? could you have been chroming? could he have been chroming? could we have been chroming? could you have been chroming? could they have been chroming?
Interro-negative form
Simple form
couldn't I chrome? couldn't you chrome? couldn't he chrome? couldn't we chrome? couldn't you chrome? couldn't they chrome?
V-ing form
couldn't I be chroming? couldn't you be chroming? couldn't he be chroming? couldn't we be chroming? couldn't you be chroming? couldn't they be chroming?
Perfect
couldn't I have chromed? couldn't you have chromed? couldn't he have chromed? couldn't we have chromed? couldn't you have chromed? couldn't they have chromed?
V-ing perfect
couldn't I have been chroming? couldn't you have been chroming? couldn't he have been chroming? couldn't we have been chroming? couldn't you have been chroming? couldn't they have been chroming?