I could buddy you could buddy he could buddy we could buddy you could buddy they could buddy
V-ing form
I could be buddying you could be buddying he could be buddying we could be buddying you could be buddying they could be buddying
Perfect
I could have buddied you could have buddied he 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 he 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 he 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 he 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 he 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 he 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 he buddy? could we buddy? could you buddy? could they buddy?
V-ing form
could I be buddying? could you be buddying? could he be buddying? could we be buddying? could you be buddying? could they be buddying?
Perfect
could I have buddied? could you have buddied? could he 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 he 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 he 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 he 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 he 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 he have been buddying? couldn't we have been buddying? couldn't you have been buddying? couldn't they have been buddying?