could stonewall
Regular verb: stonewall - stonewalled- stonewalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could stonewall
you could stonewall
he could stonewall
we could stonewall
you could stonewall
they could stonewall 	I could be stonewalling
you could be stonewalling
he could be stonewalling
we could be stonewalling
you could be stonewalling
they could be stonewalling	I could have stonewalled
you could have stonewalled
he could have stonewalled
we could have stonewalled
you could have stonewalled
they could have stonewalled	I could have been stonewalling
you could have been stonewalling
he could have been stonewalling
we could have been stonewalling
you could have been stonewalling
they could have been stonewalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't stonewall
you couldn't stonewall
he couldn't stonewall
we couldn't stonewall
you couldn't stonewall
they couldn't stonewall 	I couldn't be stonewalling
you couldn't be stonewalling
he couldn't be stonewalling
we couldn't be stonewalling
you couldn't be stonewalling
they couldn't be stonewalling	I couldn't have stonewalled
you couldn't have stonewalled
he couldn't have stonewalled
we couldn't have stonewalled
you couldn't have stonewalled
they couldn't have stonewalled	I couldn't have been stonewalling
you couldn't have been stonewalling
he couldn't have been stonewalling
we couldn't have been stonewalling
you couldn't have been stonewalling
they couldn't have been stonewalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I stonewall?
could you stonewall?
could he stonewall?
could we stonewall?
could you stonewall?
could they stonewall? 	could I be stonewalling?
could you be stonewalling?
could he be stonewalling?
could we be stonewalling?
could you be stonewalling?
could they be stonewalling? 	could I have stonewalled?
could you have stonewalled?
could he have stonewalled?
could we have stonewalled?
could you have stonewalled?
could they have stonewalled? 	could I have been stonewalling?
could you have been stonewalling?
could he have been stonewalling?
could we have been stonewalling?
could you have been stonewalling?
could they have been stonewalling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I stonewall?
couldn't you stonewall?
couldn't he stonewall?
couldn't we stonewall?
couldn't you stonewall?
couldn't they stonewall? 	couldn't I be stonewalling?
couldn't you be stonewalling?
couldn't he be stonewalling?
couldn't we be stonewalling?
couldn't you be stonewalling?
couldn't they be stonewalling? 	couldn't I have stonewalled?
couldn't you have stonewalled?
couldn't he have stonewalled?
couldn't we have stonewalled?
couldn't you have stonewalled?
couldn't they have stonewalled? 	couldn't I have been stonewalling?
couldn't you have been stonewalling?
couldn't he have been stonewalling?
couldn't we have been stonewalling?
couldn't you have been stonewalling?
couldn't they have been stonewalling?