could harrumph
Regular verb: harrumph - harrumphed- harrumphed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could harrumph
you could harrumph
he could harrumph
we could harrumph
you could harrumph
they could harrumph 	I could be harrumphing
you could be harrumphing
he could be harrumphing
we could be harrumphing
you could be harrumphing
they could be harrumphing	I could have harrumphed
you could have harrumphed
he could have harrumphed
we could have harrumphed
you could have harrumphed
they could have harrumphed	I could have been harrumphing
you could have been harrumphing
he could have been harrumphing
we could have been harrumphing
you could have been harrumphing
they could have been harrumphing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't harrumph
you couldn't harrumph
he couldn't harrumph
we couldn't harrumph
you couldn't harrumph
they couldn't harrumph 	I couldn't be harrumphing
you couldn't be harrumphing
he couldn't be harrumphing
we couldn't be harrumphing
you couldn't be harrumphing
they couldn't be harrumphing	I couldn't have harrumphed
you couldn't have harrumphed
he couldn't have harrumphed
we couldn't have harrumphed
you couldn't have harrumphed
they couldn't have harrumphed	I couldn't have been harrumphing
you couldn't have been harrumphing
he couldn't have been harrumphing
we couldn't have been harrumphing
you couldn't have been harrumphing
they couldn't have been harrumphing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I harrumph?
could you harrumph?
could he harrumph?
could we harrumph?
could you harrumph?
could they harrumph? 	could I be harrumphing?
could you be harrumphing?
could he be harrumphing?
could we be harrumphing?
could you be harrumphing?
could they be harrumphing? 	could I have harrumphed?
could you have harrumphed?
could he have harrumphed?
could we have harrumphed?
could you have harrumphed?
could they have harrumphed? 	could I have been harrumphing?
could you have been harrumphing?
could he have been harrumphing?
could we have been harrumphing?
could you have been harrumphing?
could they have been harrumphing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I harrumph?
couldn't you harrumph?
couldn't he harrumph?
couldn't we harrumph?
couldn't you harrumph?
couldn't they harrumph? 	couldn't I be harrumphing?
couldn't you be harrumphing?
couldn't he be harrumphing?
couldn't we be harrumphing?
couldn't you be harrumphing?
couldn't they be harrumphing? 	couldn't I have harrumphed?
couldn't you have harrumphed?
couldn't he have harrumphed?
couldn't we have harrumphed?
couldn't you have harrumphed?
couldn't they have harrumphed? 	couldn't I have been harrumphing?
couldn't you have been harrumphing?
couldn't he have been harrumphing?
couldn't we have been harrumphing?
couldn't you have been harrumphing?
couldn't they have been harrumphing?