English verb conjugation
COULD FRACTIONATE

Regular verb: fractionate - fractionated - fractionated

Affirmation

Simple form	V-ing form
I could fractionate you could fractionate he could fractionate we could fractionate you could fractionate they could fractionate	I could be fractionating you could be fractionating he could be fractionating we could be fractionating you could be fractionating they could be fractionating
Perfect	V-ing perfect
I could have fractionated you could have fractionated he could have fractionated we could have fractionated you could have fractionated they could have fractionated	I could have been fractionating you could have been fractionating he could have been fractionating we could have been fractionating you could have been fractionating they could have been fractionating

Negation

Simple form	V-ing form
I couldn't fractionate you couldn't fractionate he couldn't fractionate we couldn't fractionate you couldn't fractionate they couldn't fractionate	I couldn't be fractionating you couldn't be fractionating he couldn't be fractionating we couldn't be fractionating you couldn't be fractionating they couldn't be fractionating
Perfect	V-ing perfect
I couldn't have fractionated you couldn't have fractionated he couldn't have fractionated we couldn't have fractionated you couldn't have fractionated they couldn't have fractionated	I couldn't have been fractionating you couldn't have been fractionating he couldn't have been fractionating we couldn't have been fractionating you couldn't have been fractionating they couldn't have been fractionating

Interrogative form

Simple form	V-ing form
could I fractionate? could you fractionate? could he fractionate? could we fractionate? could you fractionate? could they fractionate?	could I be fractionating? could you be fractionating? could he be fractionating? could we be fractionating? could you be fractionating? could they be fractionating?
Perfect	V-ing perfect
could I have fractionated? could you have fractionated? could he have fractionated? could we have fractionated? could you have fractionated? could they have fractionated?	could I have been fractionating? could you have been fractionating? could he have been fractionating? could we have been fractionating? could you have been fractionating? could they have been fractionating?

Interro-negative form

Simple form	V-ing form
couldn't I fractionate? couldn't you fractionate? couldn't he fractionate? couldn't we fractionate? couldn't you fractionate? couldn't they fractionate?	couldn't I be fractionating? couldn't you be fractionating? couldn't he be fractionating? couldn't we be fractionating? couldn't you be fractionating? couldn't they be fractionating?
Perfect	V-ing perfect
couldn't I have fractionated? couldn't you have fractionated? couldn't he have fractionated? couldn't we have fractionated? couldn't you have fractionated? couldn't they have fractionated?	couldn't I have been fractionating? couldn't you have been fractionating? couldn't he have been fractionating? couldn't we have been fractionating? couldn't you have been fractionating? couldn't they have been fractionating?