I can board you can board he can board we can board you can board they can board
Forma con V-ing
I can be boarding you can be boarding he can be boarding we can be boarding you can be boarding they can be boarding
Perfecto
I can have boarded you can have boarded he can have boarded we can have boarded you can have boarded they can have boarded
Perfecto con V-ing
I can have been boarding you can have been boarding he can have been boarding we can have been boarding you can have been boarding they can have been boarding
Negación
Forma simple
I can't board you can't board he can't board we can't board you can't board they can't board
Forma con V-ing
I can't be boarding you can't be boarding he can't be boarding we can't be boarding you can't be boarding they can't be boarding
Perfecto
I can't have boarded you can't have boarded he can't have boarded we can't have boarded you can't have boarded they can't have boarded
Perfecto con V-ing
I can't have been boarding you can't have been boarding he can't have been boarding we can't have been boarding you can't have been boarding they can't have been boarding
Forma interrogativa
Forma simple
can I board? can you board? can he board? can we board? can you board? can they board?
Forma con V-ing
can I be boarding? can you be boarding? can he be boarding? can we be boarding? can you be boarding? can they be boarding?
Perfecto
can I have boarded? can you have boarded? can he have boarded? can we have boarded? can you have boarded? can they have boarded?
Perfecto con V-ing
can I have been boarding? can you have been boarding? can he have been boarding? can we have been boarding? can you have been boarding? can they have been boarding?
Forma interro-negativa
Forma simple
can't I board? can't you board? can't he board? can't we board? can't you board? can't they board?
Forma con V-ing
can't I be boarding? can't you be boarding? can't he be boarding? can't we be boarding? can't you be boarding? can't they be boarding?
Perfecto
can't I have boarded? can't you have boarded? can't he have boarded? can't we have boarded? can't you have boarded? can't they have boarded?
Perfecto con V-ing
can't I have been boarding? can't you have been boarding? can't he have been boarding? can't we have been boarding? can't you have been boarding? can't they have been boarding?