could grovel
Regular verb: grovel - grovelled- grovelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could grovel
you could grovel
he could grovel
we could grovel
you could grovel
they could grovel 	I could be grovelling
you could be grovelling
he could be grovelling
we could be grovelling
you could be grovelling
they could be grovelling	I could have grovelled
you could have grovelled
he could have grovelled
we could have grovelled
you could have grovelled
they could have grovelled	I could have been grovelling
you could have been grovelling
he could have been grovelling
we could have been grovelling
you could have been grovelling
they could have been grovelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't grovel
you couldn't grovel
he couldn't grovel
we couldn't grovel
you couldn't grovel
they couldn't grovel 	I couldn't be grovelling
you couldn't be grovelling
he couldn't be grovelling
we couldn't be grovelling
you couldn't be grovelling
they couldn't be grovelling	I couldn't have grovelled
you couldn't have grovelled
he couldn't have grovelled
we couldn't have grovelled
you couldn't have grovelled
they couldn't have grovelled	I couldn't have been grovelling
you couldn't have been grovelling
he couldn't have been grovelling
we couldn't have been grovelling
you couldn't have been grovelling
they couldn't have been grovelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I grovel?
could you grovel?
could he grovel?
could we grovel?
could you grovel?
could they grovel? 	could I be grovelling?
could you be grovelling?
could he be grovelling?
could we be grovelling?
could you be grovelling?
could they be grovelling? 	could I have grovelled?
could you have grovelled?
could he have grovelled?
could we have grovelled?
could you have grovelled?
could they have grovelled? 	could I have been grovelling?
could you have been grovelling?
could he have been grovelling?
could we have been grovelling?
could you have been grovelling?
could they have been grovelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I grovel?
couldn't you grovel?
couldn't he grovel?
couldn't we grovel?
couldn't you grovel?
couldn't they grovel? 	couldn't I be grovelling?
couldn't you be grovelling?
couldn't he be grovelling?
couldn't we be grovelling?
couldn't you be grovelling?
couldn't they be grovelling? 	couldn't I have grovelled?
couldn't you have grovelled?
couldn't he have grovelled?
couldn't we have grovelled?
couldn't you have grovelled?
couldn't they have grovelled? 	couldn't I have been grovelling?
couldn't you have been grovelling?
couldn't he have been grovelling?
couldn't we have been grovelling?
couldn't you have been grovelling?
couldn't they have been grovelling?