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