could plod
Regular verb: plod - plodded- plodded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could plod
you could plod
he could plod
we could plod
you could plod
they could plod 	I could be plodding
you could be plodding
he could be plodding
we could be plodding
you could be plodding
they could be plodding	I could have plodded
you could have plodded
he could have plodded
we could have plodded
you could have plodded
they could have plodded	I could have been plodding
you could have been plodding
he could have been plodding
we could have been plodding
you could have been plodding
they could have been plodding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't plod
you couldn't plod
he couldn't plod
we couldn't plod
you couldn't plod
they couldn't plod 	I couldn't be plodding
you couldn't be plodding
he couldn't be plodding
we couldn't be plodding
you couldn't be plodding
they couldn't be plodding	I couldn't have plodded
you couldn't have plodded
he couldn't have plodded
we couldn't have plodded
you couldn't have plodded
they couldn't have plodded	I couldn't have been plodding
you couldn't have been plodding
he couldn't have been plodding
we couldn't have been plodding
you couldn't have been plodding
they couldn't have been plodding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I plod?
could you plod?
could he plod?
could we plod?
could you plod?
could they plod? 	could I be plodding?
could you be plodding?
could he be plodding?
could we be plodding?
could you be plodding?
could they be plodding? 	could I have plodded?
could you have plodded?
could he have plodded?
could we have plodded?
could you have plodded?
could they have plodded? 	could I have been plodding?
could you have been plodding?
could he have been plodding?
could we have been plodding?
could you have been plodding?
could they have been plodding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I plod?
couldn't you plod?
couldn't he plod?
couldn't we plod?
couldn't you plod?
couldn't they plod? 	couldn't I be plodding?
couldn't you be plodding?
couldn't he be plodding?
couldn't we be plodding?
couldn't you be plodding?
couldn't they be plodding? 	couldn't I have plodded?
couldn't you have plodded?
couldn't he have plodded?
couldn't we have plodded?
couldn't you have plodded?
couldn't they have plodded? 	couldn't I have been plodding?
couldn't you have been plodding?
couldn't he have been plodding?
couldn't we have been plodding?
couldn't you have been plodding?
couldn't they have been plodding?