I could assist you could assist he could assist we could assist you could assist they could assist
Forme en V-ing
I could be assisting you could be assisting he could be assisting we could be assisting you could be assisting they could be assisting
Perfect
I could have assisted you could have assisted he could have assisted we could have assisted you could have assisted they could have assisted
Perfect en V-ing
I could have been assisting you could have been assisting he could have been assisting we could have been assisting you could have been assisting they could have been assisting
Négation
Forme simple
I couldn't assist you couldn't assist he couldn't assist we couldn't assist you couldn't assist they couldn't assist
Forme en V-ing
I couldn't be assisting you couldn't be assisting he couldn't be assisting we couldn't be assisting you couldn't be assisting they couldn't be assisting
Perfect
I couldn't have assisted you couldn't have assisted he couldn't have assisted we couldn't have assisted you couldn't have assisted they couldn't have assisted
Perfect en V-ing
I couldn't have been assisting you couldn't have been assisting he couldn't have been assisting we couldn't have been assisting you couldn't have been assisting they couldn't have been assisting
Forme interrogative
Forme simple
could I assist? could you assist? could he assist? could we assist? could you assist? could they assist?
Forme en V-ing
could I be assisting? could you be assisting? could he be assisting? could we be assisting? could you be assisting? could they be assisting?
Perfect
could I have assisted? could you have assisted? could he have assisted? could we have assisted? could you have assisted? could they have assisted?
Perfect en V-ing
could I have been assisting? could you have been assisting? could he have been assisting? could we have been assisting? could you have been assisting? could they have been assisting?
Forme interro-négative
Forme simple
couldn't I assist? couldn't you assist? couldn't he assist? couldn't we assist? couldn't you assist? couldn't they assist?
Forme en V-ing
couldn't I be assisting? couldn't you be assisting? couldn't he be assisting? couldn't we be assisting? couldn't you be assisting? couldn't they be assisting?
Perfect
couldn't I have assisted? couldn't you have assisted? couldn't he have assisted? couldn't we have assisted? couldn't you have assisted? couldn't they have assisted?
Perfect en V-ing
couldn't I have been assisting? couldn't you have been assisting? couldn't he have been assisting? couldn't we have been assisting? couldn't you have been assisting? couldn't they have been assisting?