could dabble
Regular verb: dabble - dabbled- dabbled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dabble
you could dabble
she could dabble
we could dabble
you could dabble
they could dabble 	I could be dabbling
you could be dabbling
she could be dabbling
we could be dabbling
you could be dabbling
they could be dabbling	I could have dabbled
you could have dabbled
she could have dabbled
we could have dabbled
you could have dabbled
they could have dabbled	I could have been dabbling
you could have been dabbling
she could have been dabbling
we could have been dabbling
you could have been dabbling
they could have been dabbling	

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

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