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