I can flat you can flat he can flat we can flat you can flat they can flat
V-ing form
I can be flating you can be flating he can be flating we can be flating you can be flating they can be flating
Perfect
I can have flated you can have flated he can have flated we can have flated you can have flated they can have flated
V-ing perfect
I can have been flating you can have been flating he can have been flating we can have been flating you can have been flating they can have been flating
Negation
Simple form
I can't flat you can't flat he can't flat we can't flat you can't flat they can't flat
V-ing form
I can't be flating you can't be flating he can't be flating we can't be flating you can't be flating they can't be flating
Perfect
I can't have flated you can't have flated he can't have flated we can't have flated you can't have flated they can't have flated
V-ing perfect
I can't have been flating you can't have been flating he can't have been flating we can't have been flating you can't have been flating they can't have been flating
Interrogative form
Simple form
can I flat? can you flat? can he flat? can we flat? can you flat? can they flat?
V-ing form
can I be flating? can you be flating? can he be flating? can we be flating? can you be flating? can they be flating?
Perfect
can I have flated? can you have flated? can he have flated? can we have flated? can you have flated? can they have flated?
V-ing perfect
can I have been flating? can you have been flating? can he have been flating? can we have been flating? can you have been flating? can they have been flating?
Interro-negative form
Simple form
can't I flat? can't you flat? can't he flat? can't we flat? can't you flat? can't they flat?
V-ing form
can't I be flating? can't you be flating? can't he be flating? can't we be flating? can't you be flating? can't they be flating?
Perfect
can't I have flated? can't you have flated? can't he have flated? can't we have flated? can't you have flated? can't they have flated?
V-ing perfect
can't I have been flating? can't you have been flating? can't he have been flating? can't we have been flating? can't you have been flating? can't they have been flating?