I can master you can master he can master we can master you can master they can master
Forma con V-ing
I can be mastering you can be mastering he can be mastering we can be mastering you can be mastering they can be mastering
Perfecto
I can have mastered you can have mastered he can have mastered we can have mastered you can have mastered they can have mastered
Perfecto con V-ing
I can have been mastering you can have been mastering he can have been mastering we can have been mastering you can have been mastering they can have been mastering
Negación
Forma simple
I can't master you can't master he can't master we can't master you can't master they can't master
Forma con V-ing
I can't be mastering you can't be mastering he can't be mastering we can't be mastering you can't be mastering they can't be mastering
Perfecto
I can't have mastered you can't have mastered he can't have mastered we can't have mastered you can't have mastered they can't have mastered
Perfecto con V-ing
I can't have been mastering you can't have been mastering he can't have been mastering we can't have been mastering you can't have been mastering they can't have been mastering
Forma interrogativa
Forma simple
can I master? can you master? can he master? can we master? can you master? can they master?
Forma con V-ing
can I be mastering? can you be mastering? can he be mastering? can we be mastering? can you be mastering? can they be mastering?
Perfecto
can I have mastered? can you have mastered? can he have mastered? can we have mastered? can you have mastered? can they have mastered?
Perfecto con V-ing
can I have been mastering? can you have been mastering? can he have been mastering? can we have been mastering? can you have been mastering? can they have been mastering?
Forma interro-negativa
Forma simple
can't I master? can't you master? can't he master? can't we master? can't you master? can't they master?
Forma con V-ing
can't I be mastering? can't you be mastering? can't he be mastering? can't we be mastering? can't you be mastering? can't they be mastering?
Perfecto
can't I have mastered? can't you have mastered? can't he have mastered? can't we have mastered? can't you have mastered? can't they have mastered?
Perfecto con V-ing
can't I have been mastering? can't you have been mastering? can't he have been mastering? can't we have been mastering? can't you have been mastering? can't they have been mastering?