I can accelerate you can accelerate he can accelerate we can accelerate you can accelerate they can accelerate
V-ing form
I can be accelerating you can be accelerating he can be accelerating we can be accelerating you can be accelerating they can be accelerating
Perfect
I can have accelerated you can have accelerated he can have accelerated we can have accelerated you can have accelerated they can have accelerated
V-ing perfect
I can have been accelerating you can have been accelerating he can have been accelerating we can have been accelerating you can have been accelerating they can have been accelerating
Negation
Simple form
I can't accelerate you can't accelerate he can't accelerate we can't accelerate you can't accelerate they can't accelerate
V-ing form
I can't be accelerating you can't be accelerating he can't be accelerating we can't be accelerating you can't be accelerating they can't be accelerating
Perfect
I can't have accelerated you can't have accelerated he can't have accelerated we can't have accelerated you can't have accelerated they can't have accelerated
V-ing perfect
I can't have been accelerating you can't have been accelerating he can't have been accelerating we can't have been accelerating you can't have been accelerating they can't have been accelerating
Interrogative form
Simple form
can I accelerate? can you accelerate? can he accelerate? can we accelerate? can you accelerate? can they accelerate?
V-ing form
can I be accelerating? can you be accelerating? can he be accelerating? can we be accelerating? can you be accelerating? can they be accelerating?
Perfect
can I have accelerated? can you have accelerated? can he have accelerated? can we have accelerated? can you have accelerated? can they have accelerated?
V-ing perfect
can I have been accelerating? can you have been accelerating? can he have been accelerating? can we have been accelerating? can you have been accelerating? can they have been accelerating?
Interro-negative form
Simple form
can't I accelerate? can't you accelerate? can't he accelerate? can't we accelerate? can't you accelerate? can't they accelerate?
V-ing form
can't I be accelerating? can't you be accelerating? can't he be accelerating? can't we be accelerating? can't you be accelerating? can't they be accelerating?
Perfect
can't I have accelerated? can't you have accelerated? can't he have accelerated? can't we have accelerated? can't you have accelerated? can't they have accelerated?
V-ing perfect
can't I have been accelerating? can't you have been accelerating? can't he have been accelerating? can't we have been accelerating? can't you have been accelerating? can't they have been accelerating?