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