I can sweat you can sweat he can sweat we can sweat you can sweat they can sweat
V-ing form
I can be sweating you can be sweating he can be sweating we can be sweating you can be sweating they can be sweating
Perfect
I can have sweated you can have sweated he can have sweated we can have sweated you can have sweated they can have sweated
V-ing perfect
I can have been sweating you can have been sweating he can have been sweating we can have been sweating you can have been sweating they can have been sweating
Negation
Simple form
I can't sweat you can't sweat he can't sweat we can't sweat you can't sweat they can't sweat
V-ing form
I can't be sweating you can't be sweating he can't be sweating we can't be sweating you can't be sweating they can't be sweating
Perfect
I can't have sweated you can't have sweated he can't have sweated we can't have sweated you can't have sweated they can't have sweated
V-ing perfect
I can't have been sweating you can't have been sweating he can't have been sweating we can't have been sweating you can't have been sweating they can't have been sweating
Interrogative form
Simple form
can I sweat? can you sweat? can he sweat? can we sweat? can you sweat? can they sweat?
V-ing form
can I be sweating? can you be sweating? can he be sweating? can we be sweating? can you be sweating? can they be sweating?
Perfect
can I have sweated? can you have sweated? can he have sweated? can we have sweated? can you have sweated? can they have sweated?
V-ing perfect
can I have been sweating? can you have been sweating? can he have been sweating? can we have been sweating? can you have been sweating? can they have been sweating?
Interro-negative form
Simple form
can't I sweat? can't you sweat? can't he sweat? can't we sweat? can't you sweat? can't they sweat?
V-ing form
can't I be sweating? can't you be sweating? can't he be sweating? can't we be sweating? can't you be sweating? can't they be sweating?
Perfect
can't I have sweated? can't you have sweated? can't he have sweated? can't we have sweated? can't you have sweated? can't they have sweated?
V-ing perfect
can't I have been sweating? can't you have been sweating? can't he have been sweating? can't we have been sweating? can't you have been sweating? can't they have been sweating?