I could weld you could weld she could weld we could weld you could weld they could weld
Forme en V-ing
I could be welding you could be welding she could be welding we could be welding you could be welding they could be welding
Perfect
I could have welded you could have welded she could have welded we could have welded you could have welded they could have welded
Perfect en V-ing
I could have been welding you could have been welding she could have been welding we could have been welding you could have been welding they could have been welding
Négation
Forme simple
I couldn't weld you couldn't weld she couldn't weld we couldn't weld you couldn't weld they couldn't weld
Forme en V-ing
I couldn't be welding you couldn't be welding she couldn't be welding we couldn't be welding you couldn't be welding they couldn't be welding
Perfect
I couldn't have welded you couldn't have welded she couldn't have welded we couldn't have welded you couldn't have welded they couldn't have welded
Perfect en V-ing
I couldn't have been welding you couldn't have been welding she couldn't have been welding we couldn't have been welding you couldn't have been welding they couldn't have been welding
Forme interrogative
Forme simple
could I weld? could you weld? could she weld? could we weld? could you weld? could they weld?
Forme en V-ing
could I be welding? could you be welding? could she be welding? could we be welding? could you be welding? could they be welding?
Perfect
could I have welded? could you have welded? could she have welded? could we have welded? could you have welded? could they have welded?
Perfect en V-ing
could I have been welding? could you have been welding? could she have been welding? could we have been welding? could you have been welding? could they have been welding?
Forme interro-négative
Forme simple
couldn't I weld? couldn't you weld? couldn't she weld? couldn't we weld? couldn't you weld? couldn't they weld?
Forme en V-ing
couldn't I be welding? couldn't you be welding? couldn't she be welding? couldn't we be welding? couldn't you be welding? couldn't they be welding?
Perfect
couldn't I have welded? couldn't you have welded? couldn't she have welded? couldn't we have welded? couldn't you have welded? couldn't they have welded?
Perfect en V-ing
couldn't I have been welding? couldn't you have been welding? couldn't she have been welding? couldn't we have been welding? couldn't you have been welding? couldn't they have been welding?