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