I could fractionate you could fractionate he could fractionate we could fractionate you could fractionate they could fractionate
Forme en V-ing
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
I could have fractionated you could have fractionated he could have fractionated we could have fractionated you could have fractionated they could have fractionated
Perfect en V-ing
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
Négation
Forme simple
I couldn't fractionate you couldn't fractionate he couldn't fractionate we couldn't fractionate you couldn't fractionate they couldn't fractionate
Forme en V-ing
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
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
Perfect en V-ing
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
Forme interrogative
Forme simple
could I fractionate? could you fractionate? could he fractionate? could we fractionate? could you fractionate? could they fractionate?
Forme en V-ing
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
could I have fractionated? could you have fractionated? could he have fractionated? could we have fractionated? could you have fractionated? could they have fractionated?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
couldn't I fractionate? couldn't you fractionate? couldn't he fractionate? couldn't we fractionate? couldn't you fractionate? couldn't they fractionate?
Forme en V-ing
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
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?
Perfect en V-ing
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?