could adduct
Regular verb: adduct - adducted- adducted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could adduct
you could adduct
he could adduct
we could adduct
you could adduct
they could adduct 	I could be adducting
you could be adducting
he could be adducting
we could be adducting
you could be adducting
they could be adducting	I could have adducted
you could have adducted
he could have adducted
we could have adducted
you could have adducted
they could have adducted	I could have been adducting
you could have been adducting
he could have been adducting
we could have been adducting
you could have been adducting
they could have been adducting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't adduct
you couldn't adduct
he couldn't adduct
we couldn't adduct
you couldn't adduct
they couldn't adduct 	I couldn't be adducting
you couldn't be adducting
he couldn't be adducting
we couldn't be adducting
you couldn't be adducting
they couldn't be adducting	I couldn't have adducted
you couldn't have adducted
he couldn't have adducted
we couldn't have adducted
you couldn't have adducted
they couldn't have adducted	I couldn't have been adducting
you couldn't have been adducting
he couldn't have been adducting
we couldn't have been adducting
you couldn't have been adducting
they couldn't have been adducting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I adduct?
could you adduct?
could he adduct?
could we adduct?
could you adduct?
could they adduct? 	could I be adducting?
could you be adducting?
could he be adducting?
could we be adducting?
could you be adducting?
could they be adducting? 	could I have adducted?
could you have adducted?
could he have adducted?
could we have adducted?
could you have adducted?
could they have adducted? 	could I have been adducting?
could you have been adducting?
could he have been adducting?
could we have been adducting?
could you have been adducting?
could they have been adducting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I adduct?
couldn't you adduct?
couldn't he adduct?
couldn't we adduct?
couldn't you adduct?
couldn't they adduct? 	couldn't I be adducting?
couldn't you be adducting?
couldn't he be adducting?
couldn't we be adducting?
couldn't you be adducting?
couldn't they be adducting? 	couldn't I have adducted?
couldn't you have adducted?
couldn't he have adducted?
couldn't we have adducted?
couldn't you have adducted?
couldn't they have adducted? 	couldn't I have been adducting?
couldn't you have been adducting?
couldn't he have been adducting?
couldn't we have been adducting?
couldn't you have been adducting?
couldn't they have been adducting?