could methylate
Regular verb: methylate - methylated- methylated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could methylate
you could methylate
he could methylate
we could methylate
you could methylate
they could methylate 	I could be methylating
you could be methylating
he could be methylating
we could be methylating
you could be methylating
they could be methylating	I could have methylated
you could have methylated
he could have methylated
we could have methylated
you could have methylated
they could have methylated	I could have been methylating
you could have been methylating
he could have been methylating
we could have been methylating
you could have been methylating
they could have been methylating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't methylate
you couldn't methylate
he couldn't methylate
we couldn't methylate
you couldn't methylate
they couldn't methylate 	I couldn't be methylating
you couldn't be methylating
he couldn't be methylating
we couldn't be methylating
you couldn't be methylating
they couldn't be methylating	I couldn't have methylated
you couldn't have methylated
he couldn't have methylated
we couldn't have methylated
you couldn't have methylated
they couldn't have methylated	I couldn't have been methylating
you couldn't have been methylating
he couldn't have been methylating
we couldn't have been methylating
you couldn't have been methylating
they couldn't have been methylating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I methylate?
could you methylate?
could he methylate?
could we methylate?
could you methylate?
could they methylate? 	could I be methylating?
could you be methylating?
could he be methylating?
could we be methylating?
could you be methylating?
could they be methylating? 	could I have methylated?
could you have methylated?
could he have methylated?
could we have methylated?
could you have methylated?
could they have methylated? 	could I have been methylating?
could you have been methylating?
could he have been methylating?
could we have been methylating?
could you have been methylating?
could they have been methylating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I methylate?
couldn't you methylate?
couldn't he methylate?
couldn't we methylate?
couldn't you methylate?
couldn't they methylate? 	couldn't I be methylating?
couldn't you be methylating?
couldn't he be methylating?
couldn't we be methylating?
couldn't you be methylating?
couldn't they be methylating? 	couldn't I have methylated?
couldn't you have methylated?
couldn't he have methylated?
couldn't we have methylated?
couldn't you have methylated?
couldn't they have methylated? 	couldn't I have been methylating?
couldn't you have been methylating?
couldn't he have been methylating?
couldn't we have been methylating?
couldn't you have been methylating?
couldn't they have been methylating?