I could amble you could amble she could amble we could amble you could amble they could amble
V-ing form
I could be ambling you could be ambling she could be ambling we could be ambling you could be ambling they could be ambling
Perfect
I could have ambled you could have ambled she could have ambled we could have ambled you could have ambled they could have ambled
V-ing perfect
I could have been ambling you could have been ambling she could have been ambling we could have been ambling you could have been ambling they could have been ambling
Negation
Simple form
I couldn't amble you couldn't amble she couldn't amble we couldn't amble you couldn't amble they couldn't amble
V-ing form
I couldn't be ambling you couldn't be ambling she couldn't be ambling we couldn't be ambling you couldn't be ambling they couldn't be ambling
Perfect
I couldn't have ambled you couldn't have ambled she couldn't have ambled we couldn't have ambled you couldn't have ambled they couldn't have ambled
V-ing perfect
I couldn't have been ambling you couldn't have been ambling she couldn't have been ambling we couldn't have been ambling you couldn't have been ambling they couldn't have been ambling
Interrogative form
Simple form
could I amble? could you amble? could she amble? could we amble? could you amble? could they amble?
V-ing form
could I be ambling? could you be ambling? could she be ambling? could we be ambling? could you be ambling? could they be ambling?
Perfect
could I have ambled? could you have ambled? could she have ambled? could we have ambled? could you have ambled? could they have ambled?
V-ing perfect
could I have been ambling? could you have been ambling? could she have been ambling? could we have been ambling? could you have been ambling? could they have been ambling?
Interro-negative form
Simple form
couldn't I amble? couldn't you amble? couldn't she amble? couldn't we amble? couldn't you amble? couldn't they amble?
V-ing form
couldn't I be ambling? couldn't you be ambling? couldn't she be ambling? couldn't we be ambling? couldn't you be ambling? couldn't they be ambling?
Perfect
couldn't I have ambled? couldn't you have ambled? couldn't she have ambled? couldn't we have ambled? couldn't you have ambled? couldn't they have ambled?
V-ing perfect
couldn't I have been ambling? couldn't you have been ambling? couldn't she have been ambling? couldn't we have been ambling? couldn't you have been ambling? couldn't they have been ambling?