I can bush you can bush he can bush we can bush you can bush they can bush
V-ing form
I can be bushing you can be bushing he can be bushing we can be bushing you can be bushing they can be bushing
Perfect
I can have bushed you can have bushed he can have bushed we can have bushed you can have bushed they can have bushed
V-ing perfect
I can have been bushing you can have been bushing he can have been bushing we can have been bushing you can have been bushing they can have been bushing
Negation
Simple form
I can't bush you can't bush he can't bush we can't bush you can't bush they can't bush
V-ing form
I can't be bushing you can't be bushing he can't be bushing we can't be bushing you can't be bushing they can't be bushing
Perfect
I can't have bushed you can't have bushed he can't have bushed we can't have bushed you can't have bushed they can't have bushed
V-ing perfect
I can't have been bushing you can't have been bushing he can't have been bushing we can't have been bushing you can't have been bushing they can't have been bushing
Interrogative form
Simple form
can I bush? can you bush? can he bush? can we bush? can you bush? can they bush?
V-ing form
can I be bushing? can you be bushing? can he be bushing? can we be bushing? can you be bushing? can they be bushing?
Perfect
can I have bushed? can you have bushed? can he have bushed? can we have bushed? can you have bushed? can they have bushed?
V-ing perfect
can I have been bushing? can you have been bushing? can he have been bushing? can we have been bushing? can you have been bushing? can they have been bushing?
Interro-negative form
Simple form
can't I bush? can't you bush? can't he bush? can't we bush? can't you bush? can't they bush?
V-ing form
can't I be bushing? can't you be bushing? can't he be bushing? can't we be bushing? can't you be bushing? can't they be bushing?
Perfect
can't I have bushed? can't you have bushed? can't he have bushed? can't we have bushed? can't you have bushed? can't they have bushed?
V-ing perfect
can't I have been bushing? can't you have been bushing? can't he have been bushing? can't we have been bushing? can't you have been bushing? can't they have been bushing?