I could wad you could wad he could wad we could wad you could wad they could wad
V-ing form
I could be wadding you could be wadding he could be wadding we could be wadding you could be wadding they could be wadding
Perfect
I could have wadded you could have wadded he could have wadded we could have wadded you could have wadded they could have wadded
V-ing perfect
I could have been wadding you could have been wadding he could have been wadding we could have been wadding you could have been wadding they could have been wadding
Negation
Simple form
I couldn't wad you couldn't wad he couldn't wad we couldn't wad you couldn't wad they couldn't wad
V-ing form
I couldn't be wadding you couldn't be wadding he couldn't be wadding we couldn't be wadding you couldn't be wadding they couldn't be wadding
Perfect
I couldn't have wadded you couldn't have wadded he couldn't have wadded we couldn't have wadded you couldn't have wadded they couldn't have wadded
V-ing perfect
I couldn't have been wadding you couldn't have been wadding he couldn't have been wadding we couldn't have been wadding you couldn't have been wadding they couldn't have been wadding
Interrogative form
Simple form
could I wad? could you wad? could he wad? could we wad? could you wad? could they wad?
V-ing form
could I be wadding? could you be wadding? could he be wadding? could we be wadding? could you be wadding? could they be wadding?
Perfect
could I have wadded? could you have wadded? could he have wadded? could we have wadded? could you have wadded? could they have wadded?
V-ing perfect
could I have been wadding? could you have been wadding? could he have been wadding? could we have been wadding? could you have been wadding? could they have been wadding?
Interro-negative form
Simple form
couldn't I wad? couldn't you wad? couldn't he wad? couldn't we wad? couldn't you wad? couldn't they wad?
V-ing form
couldn't I be wadding? couldn't you be wadding? couldn't he be wadding? couldn't we be wadding? couldn't you be wadding? couldn't they be wadding?
Perfect
couldn't I have wadded? couldn't you have wadded? couldn't he have wadded? couldn't we have wadded? couldn't you have wadded? couldn't they have wadded?
V-ing perfect
couldn't I have been wadding? couldn't you have been wadding? couldn't he have been wadding? couldn't we have been wadding? couldn't you have been wadding? couldn't they have been wadding?