I could join you could join she could join we could join you could join they could join
Forma con V-ing
I could be joining you could be joining she could be joining we could be joining you could be joining they could be joining
Perfecto
I could have joined you could have joined she could have joined we could have joined you could have joined they could have joined
Perfecto con V-ing
I could have been joining you could have been joining she could have been joining we could have been joining you could have been joining they could have been joining
Negación
Forma simple
I couldn't join you couldn't join she couldn't join we couldn't join you couldn't join they couldn't join
Forma con V-ing
I couldn't be joining you couldn't be joining she couldn't be joining we couldn't be joining you couldn't be joining they couldn't be joining
Perfecto
I couldn't have joined you couldn't have joined she couldn't have joined we couldn't have joined you couldn't have joined they couldn't have joined
Perfecto con V-ing
I couldn't have been joining you couldn't have been joining she couldn't have been joining we couldn't have been joining you couldn't have been joining they couldn't have been joining
Forma interrogativa
Forma simple
could I join? could you join? could she join? could we join? could you join? could they join?
Forma con V-ing
could I be joining? could you be joining? could she be joining? could we be joining? could you be joining? could they be joining?
Perfecto
could I have joined? could you have joined? could she have joined? could we have joined? could you have joined? could they have joined?
Perfecto con V-ing
could I have been joining? could you have been joining? could she have been joining? could we have been joining? could you have been joining? could they have been joining?
Forma interro-negativa
Forma simple
couldn't I join? couldn't you join? couldn't she join? couldn't we join? couldn't you join? couldn't they join?
Forma con V-ing
couldn't I be joining? couldn't you be joining? couldn't she be joining? couldn't we be joining? couldn't you be joining? couldn't they be joining?
Perfecto
couldn't I have joined? couldn't you have joined? couldn't she have joined? couldn't we have joined? couldn't you have joined? couldn't they have joined?
Perfecto con V-ing
couldn't I have been joining? couldn't you have been joining? couldn't she have been joining? couldn't we have been joining? couldn't you have been joining? couldn't they have been joining?