I can beach you can beach he can beach we can beach you can beach they can beach
V-ing form
I can be beaching you can be beaching he can be beaching we can be beaching you can be beaching they can be beaching
Perfect
I can have beached you can have beached he can have beached we can have beached you can have beached they can have beached
V-ing perfect
I can have been beaching you can have been beaching he can have been beaching we can have been beaching you can have been beaching they can have been beaching
Negation
Simple form
I can't beach you can't beach he can't beach we can't beach you can't beach they can't beach
V-ing form
I can't be beaching you can't be beaching he can't be beaching we can't be beaching you can't be beaching they can't be beaching
Perfect
I can't have beached you can't have beached he can't have beached we can't have beached you can't have beached they can't have beached
V-ing perfect
I can't have been beaching you can't have been beaching he can't have been beaching we can't have been beaching you can't have been beaching they can't have been beaching
Interrogative form
Simple form
can I beach? can you beach? can he beach? can we beach? can you beach? can they beach?
V-ing form
can I be beaching? can you be beaching? can he be beaching? can we be beaching? can you be beaching? can they be beaching?
Perfect
can I have beached? can you have beached? can he have beached? can we have beached? can you have beached? can they have beached?
V-ing perfect
can I have been beaching? can you have been beaching? can he have been beaching? can we have been beaching? can you have been beaching? can they have been beaching?
Interro-negative form
Simple form
can't I beach? can't you beach? can't he beach? can't we beach? can't you beach? can't they beach?
V-ing form
can't I be beaching? can't you be beaching? can't he be beaching? can't we be beaching? can't you be beaching? can't they be beaching?
Perfect
can't I have beached? can't you have beached? can't he have beached? can't we have beached? can't you have beached? can't they have beached?
V-ing perfect
can't I have been beaching? can't you have been beaching? can't he have been beaching? can't we have been beaching? can't you have been beaching? can't they have been beaching?