could metabolise
Regular verb: metabolise - metabolised- metabolised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could metabolise
you could metabolise
he could metabolise
we could metabolise
you could metabolise
they could metabolise 	I could be metabolising
you could be metabolising
he could be metabolising
we could be metabolising
you could be metabolising
they could be metabolising	I could have metabolised
you could have metabolised
he could have metabolised
we could have metabolised
you could have metabolised
they could have metabolised	I could have been metabolising
you could have been metabolising
he could have been metabolising
we could have been metabolising
you could have been metabolising
they could have been metabolising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't metabolise
you couldn't metabolise
he couldn't metabolise
we couldn't metabolise
you couldn't metabolise
they couldn't metabolise 	I couldn't be metabolising
you couldn't be metabolising
he couldn't be metabolising
we couldn't be metabolising
you couldn't be metabolising
they couldn't be metabolising	I couldn't have metabolised
you couldn't have metabolised
he couldn't have metabolised
we couldn't have metabolised
you couldn't have metabolised
they couldn't have metabolised	I couldn't have been metabolising
you couldn't have been metabolising
he couldn't have been metabolising
we couldn't have been metabolising
you couldn't have been metabolising
they couldn't have been metabolising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I metabolise?
could you metabolise?
could he metabolise?
could we metabolise?
could you metabolise?
could they metabolise? 	could I be metabolising?
could you be metabolising?
could he be metabolising?
could we be metabolising?
could you be metabolising?
could they be metabolising? 	could I have metabolised?
could you have metabolised?
could he have metabolised?
could we have metabolised?
could you have metabolised?
could they have metabolised? 	could I have been metabolising?
could you have been metabolising?
could he have been metabolising?
could we have been metabolising?
could you have been metabolising?
could they have been metabolising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I metabolise?
couldn't you metabolise?
couldn't he metabolise?
couldn't we metabolise?
couldn't you metabolise?
couldn't they metabolise? 	couldn't I be metabolising?
couldn't you be metabolising?
couldn't he be metabolising?
couldn't we be metabolising?
couldn't you be metabolising?
couldn't they be metabolising? 	couldn't I have metabolised?
couldn't you have metabolised?
couldn't he have metabolised?
couldn't we have metabolised?
couldn't you have metabolised?
couldn't they have metabolised? 	couldn't I have been metabolising?
couldn't you have been metabolising?
couldn't he have been metabolising?
couldn't we have been metabolising?
couldn't you have been metabolising?
couldn't they have been metabolising?