I can gush you can gush he can gush we can gush you can gush they can gush
V-ing form
I can be gushing you can be gushing he can be gushing we can be gushing you can be gushing they can be gushing
Perfect
I can have gushed you can have gushed he can have gushed we can have gushed you can have gushed they can have gushed
V-ing perfect
I can have been gushing you can have been gushing he can have been gushing we can have been gushing you can have been gushing they can have been gushing
Negation
Simple form
I can't gush you can't gush he can't gush we can't gush you can't gush they can't gush
V-ing form
I can't be gushing you can't be gushing he can't be gushing we can't be gushing you can't be gushing they can't be gushing
Perfect
I can't have gushed you can't have gushed he can't have gushed we can't have gushed you can't have gushed they can't have gushed
V-ing perfect
I can't have been gushing you can't have been gushing he can't have been gushing we can't have been gushing you can't have been gushing they can't have been gushing
Interrogative form
Simple form
can I gush? can you gush? can he gush? can we gush? can you gush? can they gush?
V-ing form
can I be gushing? can you be gushing? can he be gushing? can we be gushing? can you be gushing? can they be gushing?
Perfect
can I have gushed? can you have gushed? can he have gushed? can we have gushed? can you have gushed? can they have gushed?
V-ing perfect
can I have been gushing? can you have been gushing? can he have been gushing? can we have been gushing? can you have been gushing? can they have been gushing?
Interro-negative form
Simple form
can't I gush? can't you gush? can't he gush? can't we gush? can't you gush? can't they gush?
V-ing form
can't I be gushing? can't you be gushing? can't he be gushing? can't we be gushing? can't you be gushing? can't they be gushing?
Perfect
can't I have gushed? can't you have gushed? can't he have gushed? can't we have gushed? can't you have gushed? can't they have gushed?
V-ing perfect
can't I have been gushing? can't you have been gushing? can't he have been gushing? can't we have been gushing? can't you have been gushing? can't they have been gushing?