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