I can trot you can trot she can trot we can trot you can trot they can trot
V-ing form
I can be trotting you can be trotting she can be trotting we can be trotting you can be trotting they can be trotting
Perfect
I can have trotted you can have trotted she can have trotted we can have trotted you can have trotted they can have trotted
V-ing perfect
I can have been trotting you can have been trotting she can have been trotting we can have been trotting you can have been trotting they can have been trotting
Negation
Simple form
I can't trot you can't trot she can't trot we can't trot you can't trot they can't trot
V-ing form
I can't be trotting you can't be trotting she can't be trotting we can't be trotting you can't be trotting they can't be trotting
Perfect
I can't have trotted you can't have trotted she can't have trotted we can't have trotted you can't have trotted they can't have trotted
V-ing perfect
I can't have been trotting you can't have been trotting she can't have been trotting we can't have been trotting you can't have been trotting they can't have been trotting
Interrogative form
Simple form
can I trot? can you trot? can she trot? can we trot? can you trot? can they trot?
V-ing form
can I be trotting? can you be trotting? can she be trotting? can we be trotting? can you be trotting? can they be trotting?
Perfect
can I have trotted? can you have trotted? can she have trotted? can we have trotted? can you have trotted? can they have trotted?
V-ing perfect
can I have been trotting? can you have been trotting? can she have been trotting? can we have been trotting? can you have been trotting? can they have been trotting?
Interro-negative form
Simple form
can't I trot? can't you trot? can't she trot? can't we trot? can't you trot? can't they trot?
V-ing form
can't I be trotting? can't you be trotting? can't she be trotting? can't we be trotting? can't you be trotting? can't they be trotting?
Perfect
can't I have trotted? can't you have trotted? can't she have trotted? can't we have trotted? can't you have trotted? can't they have trotted?
V-ing perfect
can't I have been trotting? can't you have been trotting? can't she have been trotting? can't we have been trotting? can't you have been trotting? can't they have been trotting?