could digest
Regular verb: digest - digested- digested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could digest
you could digest
he could digest
we could digest
you could digest
they could digest 	I could be digesting
you could be digesting
he could be digesting
we could be digesting
you could be digesting
they could be digesting	I could have digested
you could have digested
he could have digested
we could have digested
you could have digested
they could have digested	I could have been digesting
you could have been digesting
he could have been digesting
we could have been digesting
you could have been digesting
they could have been digesting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't digest
you couldn't digest
he couldn't digest
we couldn't digest
you couldn't digest
they couldn't digest 	I couldn't be digesting
you couldn't be digesting
he couldn't be digesting
we couldn't be digesting
you couldn't be digesting
they couldn't be digesting	I couldn't have digested
you couldn't have digested
he couldn't have digested
we couldn't have digested
you couldn't have digested
they couldn't have digested	I couldn't have been digesting
you couldn't have been digesting
he couldn't have been digesting
we couldn't have been digesting
you couldn't have been digesting
they couldn't have been digesting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I digest?
could you digest?
could he digest?
could we digest?
could you digest?
could they digest? 	could I be digesting?
could you be digesting?
could he be digesting?
could we be digesting?
could you be digesting?
could they be digesting? 	could I have digested?
could you have digested?
could he have digested?
could we have digested?
could you have digested?
could they have digested? 	could I have been digesting?
could you have been digesting?
could he have been digesting?
could we have been digesting?
could you have been digesting?
could they have been digesting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I digest?
couldn't you digest?
couldn't he digest?
couldn't we digest?
couldn't you digest?
couldn't they digest? 	couldn't I be digesting?
couldn't you be digesting?
couldn't he be digesting?
couldn't we be digesting?
couldn't you be digesting?
couldn't they be digesting? 	couldn't I have digested?
couldn't you have digested?
couldn't he have digested?
couldn't we have digested?
couldn't you have digested?
couldn't they have digested? 	couldn't I have been digesting?
couldn't you have been digesting?
couldn't he have been digesting?
couldn't we have been digesting?
couldn't you have been digesting?
couldn't they have been digesting?