I could wobble you could wobble he could wobble we could wobble you could wobble they could wobble
V-ing form
I could be wobbling you could be wobbling he could be wobbling we could be wobbling you could be wobbling they could be wobbling
Perfect
I could have wobbled you could have wobbled he 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 he 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 he 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 he 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 he 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 he 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 he wobble? could we wobble? could you wobble? could they wobble?
V-ing form
could I be wobbling? could you be wobbling? could he be wobbling? could we be wobbling? could you be wobbling? could they be wobbling?
Perfect
could I have wobbled? could you have wobbled? could he 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 he 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 he 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 he 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 he 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 he have been wobbling? couldn't we have been wobbling? couldn't you have been wobbling? couldn't they have been wobbling?