I can react you can react she can react we can react you can react they can react
V-ing form
I can be reacting you can be reacting she can be reacting we can be reacting you can be reacting they can be reacting
Perfect
I can have reacted you can have reacted she can have reacted we can have reacted you can have reacted they can have reacted
V-ing perfect
I can have been reacting you can have been reacting she can have been reacting we can have been reacting you can have been reacting they can have been reacting
Negation
Simple form
I can't react you can't react she can't react we can't react you can't react they can't react
V-ing form
I can't be reacting you can't be reacting she can't be reacting we can't be reacting you can't be reacting they can't be reacting
Perfect
I can't have reacted you can't have reacted she can't have reacted we can't have reacted you can't have reacted they can't have reacted
V-ing perfect
I can't have been reacting you can't have been reacting she can't have been reacting we can't have been reacting you can't have been reacting they can't have been reacting
Interrogative form
Simple form
can I react? can you react? can she react? can we react? can you react? can they react?
V-ing form
can I be reacting? can you be reacting? can she be reacting? can we be reacting? can you be reacting? can they be reacting?
Perfect
can I have reacted? can you have reacted? can she have reacted? can we have reacted? can you have reacted? can they have reacted?
V-ing perfect
can I have been reacting? can you have been reacting? can she have been reacting? can we have been reacting? can you have been reacting? can they have been reacting?
Interro-negative form
Simple form
can't I react? can't you react? can't she react? can't we react? can't you react? can't they react?
V-ing form
can't I be reacting? can't you be reacting? can't she be reacting? can't we be reacting? can't you be reacting? can't they be reacting?
Perfect
can't I have reacted? can't you have reacted? can't she have reacted? can't we have reacted? can't you have reacted? can't they have reacted?
V-ing perfect
can't I have been reacting? can't you have been reacting? can't she have been reacting? can't we have been reacting? can't you have been reacting? can't they have been reacting?