I can row you can row he can row we can row you can row they can row
V-ing form
I can be rowing you can be rowing he can be rowing we can be rowing you can be rowing they can be rowing
Perfect
I can have rowed you can have rowed he can have rowed we can have rowed you can have rowed they can have rowed
V-ing perfect
I can have been rowing you can have been rowing he can have been rowing we can have been rowing you can have been rowing they can have been rowing
Negation
Simple form
I can't row you can't row he can't row we can't row you can't row they can't row
V-ing form
I can't be rowing you can't be rowing he can't be rowing we can't be rowing you can't be rowing they can't be rowing
Perfect
I can't have rowed you can't have rowed he can't have rowed we can't have rowed you can't have rowed they can't have rowed
V-ing perfect
I can't have been rowing you can't have been rowing he can't have been rowing we can't have been rowing you can't have been rowing they can't have been rowing
Interrogative form
Simple form
can I row? can you row? can he row? can we row? can you row? can they row?
V-ing form
can I be rowing? can you be rowing? can he be rowing? can we be rowing? can you be rowing? can they be rowing?
Perfect
can I have rowed? can you have rowed? can he have rowed? can we have rowed? can you have rowed? can they have rowed?
V-ing perfect
can I have been rowing? can you have been rowing? can he have been rowing? can we have been rowing? can you have been rowing? can they have been rowing?
Interro-negative form
Simple form
can't I row? can't you row? can't he row? can't we row? can't you row? can't they row?
V-ing form
can't I be rowing? can't you be rowing? can't he be rowing? can't we be rowing? can't you be rowing? can't they be rowing?
Perfect
can't I have rowed? can't you have rowed? can't he have rowed? can't we have rowed? can't you have rowed? can't they have rowed?
V-ing perfect
can't I have been rowing? can't you have been rowing? can't he have been rowing? can't we have been rowing? can't you have been rowing? can't they have been rowing?