I could buddy you could buddy she could buddy we could buddy you could buddy they could buddy
V-ing form
I could be buddying you could be buddying she could be buddying we could be buddying you could be buddying they could be buddying
Perfect
I could have buddied you could have buddied she could have buddied we could have buddied you could have buddied they could have buddied
V-ing perfect
I could have been buddying you could have been buddying she could have been buddying we could have been buddying you could have been buddying they could have been buddying
Negation
Simple form
I couldn't buddy you couldn't buddy she couldn't buddy we couldn't buddy you couldn't buddy they couldn't buddy
V-ing form
I couldn't be buddying you couldn't be buddying she couldn't be buddying we couldn't be buddying you couldn't be buddying they couldn't be buddying
Perfect
I couldn't have buddied you couldn't have buddied she couldn't have buddied we couldn't have buddied you couldn't have buddied they couldn't have buddied
V-ing perfect
I couldn't have been buddying you couldn't have been buddying she couldn't have been buddying we couldn't have been buddying you couldn't have been buddying they couldn't have been buddying
Interrogative form
Simple form
could I buddy? could you buddy? could she buddy? could we buddy? could you buddy? could they buddy?
V-ing form
could I be buddying? could you be buddying? could she be buddying? could we be buddying? could you be buddying? could they be buddying?
Perfect
could I have buddied? could you have buddied? could she have buddied? could we have buddied? could you have buddied? could they have buddied?
V-ing perfect
could I have been buddying? could you have been buddying? could she have been buddying? could we have been buddying? could you have been buddying? could they have been buddying?
Interro-negative form
Simple form
couldn't I buddy? couldn't you buddy? couldn't she buddy? couldn't we buddy? couldn't you buddy? couldn't they buddy?
V-ing form
couldn't I be buddying? couldn't you be buddying? couldn't she be buddying? couldn't we be buddying? couldn't you be buddying? couldn't they be buddying?
Perfect
couldn't I have buddied? couldn't you have buddied? couldn't she have buddied? couldn't we have buddied? couldn't you have buddied? couldn't they have buddied?
V-ing perfect
couldn't I have been buddying? couldn't you have been buddying? couldn't she have been buddying? couldn't we have been buddying? couldn't you have been buddying? couldn't they have been buddying?