English verb conjugation
COULD METHYLATE

Regular verb: methylate - methylated - methylated

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?