I can brainstorm you can brainstorm she can brainstorm we can brainstorm you can brainstorm they can brainstorm
V-ing form
I can be brainstorming you can be brainstorming she can be brainstorming we can be brainstorming you can be brainstorming they can be brainstorming
Perfect
I can have brainstormed you can have brainstormed she can have brainstormed we can have brainstormed you can have brainstormed they can have brainstormed
V-ing perfect
I can have been brainstorming you can have been brainstorming she can have been brainstorming we can have been brainstorming you can have been brainstorming they can have been brainstorming
Negation
Simple form
I can't brainstorm you can't brainstorm she can't brainstorm we can't brainstorm you can't brainstorm they can't brainstorm
V-ing form
I can't be brainstorming you can't be brainstorming she can't be brainstorming we can't be brainstorming you can't be brainstorming they can't be brainstorming
Perfect
I can't have brainstormed you can't have brainstormed she can't have brainstormed we can't have brainstormed you can't have brainstormed they can't have brainstormed
V-ing perfect
I can't have been brainstorming you can't have been brainstorming she can't have been brainstorming we can't have been brainstorming you can't have been brainstorming they can't have been brainstorming
Interrogative form
Simple form
can I brainstorm? can you brainstorm? can she brainstorm? can we brainstorm? can you brainstorm? can they brainstorm?
V-ing form
can I be brainstorming? can you be brainstorming? can she be brainstorming? can we be brainstorming? can you be brainstorming? can they be brainstorming?
Perfect
can I have brainstormed? can you have brainstormed? can she have brainstormed? can we have brainstormed? can you have brainstormed? can they have brainstormed?
V-ing perfect
can I have been brainstorming? can you have been brainstorming? can she have been brainstorming? can we have been brainstorming? can you have been brainstorming? can they have been brainstorming?
Interro-negative form
Simple form
can't I brainstorm? can't you brainstorm? can't she brainstorm? can't we brainstorm? can't you brainstorm? can't they brainstorm?
V-ing form
can't I be brainstorming? can't you be brainstorming? can't she be brainstorming? can't we be brainstorming? can't you be brainstorming? can't they be brainstorming?
Perfect
can't I have brainstormed? can't you have brainstormed? can't she have brainstormed? can't we have brainstormed? can't you have brainstormed? can't they have brainstormed?
V-ing perfect
can't I have been brainstorming? can't you have been brainstorming? can't she have been brainstorming? can't we have been brainstorming? can't you have been brainstorming? can't they have been brainstorming?