I can stroll you can stroll he can stroll we can stroll you can stroll they can stroll
V-ing form
I can be strolling you can be strolling he can be strolling we can be strolling you can be strolling they can be strolling
Perfect
I can have strolled you can have strolled he can have strolled we can have strolled you can have strolled they can have strolled
V-ing perfect
I can have been strolling you can have been strolling he can have been strolling we can have been strolling you can have been strolling they can have been strolling
Negation
Simple form
I can't stroll you can't stroll he can't stroll we can't stroll you can't stroll they can't stroll
V-ing form
I can't be strolling you can't be strolling he can't be strolling we can't be strolling you can't be strolling they can't be strolling
Perfect
I can't have strolled you can't have strolled he can't have strolled we can't have strolled you can't have strolled they can't have strolled
V-ing perfect
I can't have been strolling you can't have been strolling he can't have been strolling we can't have been strolling you can't have been strolling they can't have been strolling
Interrogative form
Simple form
can I stroll? can you stroll? can he stroll? can we stroll? can you stroll? can they stroll?
V-ing form
can I be strolling? can you be strolling? can he be strolling? can we be strolling? can you be strolling? can they be strolling?
Perfect
can I have strolled? can you have strolled? can he have strolled? can we have strolled? can you have strolled? can they have strolled?
V-ing perfect
can I have been strolling? can you have been strolling? can he have been strolling? can we have been strolling? can you have been strolling? can they have been strolling?
Interro-negative form
Simple form
can't I stroll? can't you stroll? can't he stroll? can't we stroll? can't you stroll? can't they stroll?
V-ing form
can't I be strolling? can't you be strolling? can't he be strolling? can't we be strolling? can't you be strolling? can't they be strolling?
Perfect
can't I have strolled? can't you have strolled? can't he have strolled? can't we have strolled? can't you have strolled? can't they have strolled?
V-ing perfect
can't I have been strolling? can't you have been strolling? can't he have been strolling? can't we have been strolling? can't you have been strolling? can't they have been strolling?