I can gush you can gush she can gush we can gush you can gush they can gush
V-ing form
I can be gushing you can be gushing she can be gushing we can be gushing you can be gushing they can be gushing
Perfect
I can have gushed you can have gushed she 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 she 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 she 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 she 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 she 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 she 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 she gush? can we gush? can you gush? can they gush?
V-ing form
can I be gushing? can you be gushing? can she be gushing? can we be gushing? can you be gushing? can they be gushing?
Perfect
can I have gushed? can you have gushed? can she 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 she 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 she 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 she 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 she 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 she have been gushing? can't we have been gushing? can't you have been gushing? can't they have been gushing?