I can meliorate you can meliorate he can meliorate we can meliorate you can meliorate they can meliorate
V-ing form
I can be meliorating you can be meliorating he can be meliorating we can be meliorating you can be meliorating they can be meliorating
Perfect
I can have meliorated you can have meliorated he can have meliorated we can have meliorated you can have meliorated they can have meliorated
V-ing perfect
I can have been meliorating you can have been meliorating he can have been meliorating we can have been meliorating you can have been meliorating they can have been meliorating
Negation
Simple form
I can't meliorate you can't meliorate he can't meliorate we can't meliorate you can't meliorate they can't meliorate
V-ing form
I can't be meliorating you can't be meliorating he can't be meliorating we can't be meliorating you can't be meliorating they can't be meliorating
Perfect
I can't have meliorated you can't have meliorated he can't have meliorated we can't have meliorated you can't have meliorated they can't have meliorated
V-ing perfect
I can't have been meliorating you can't have been meliorating he can't have been meliorating we can't have been meliorating you can't have been meliorating they can't have been meliorating
Interrogative form
Simple form
can I meliorate? can you meliorate? can he meliorate? can we meliorate? can you meliorate? can they meliorate?
V-ing form
can I be meliorating? can you be meliorating? can he be meliorating? can we be meliorating? can you be meliorating? can they be meliorating?
Perfect
can I have meliorated? can you have meliorated? can he have meliorated? can we have meliorated? can you have meliorated? can they have meliorated?
V-ing perfect
can I have been meliorating? can you have been meliorating? can he have been meliorating? can we have been meliorating? can you have been meliorating? can they have been meliorating?
Interro-negative form
Simple form
can't I meliorate? can't you meliorate? can't he meliorate? can't we meliorate? can't you meliorate? can't they meliorate?
V-ing form
can't I be meliorating? can't you be meliorating? can't he be meliorating? can't we be meliorating? can't you be meliorating? can't they be meliorating?
Perfect
can't I have meliorated? can't you have meliorated? can't he have meliorated? can't we have meliorated? can't you have meliorated? can't they have meliorated?
V-ing perfect
can't I have been meliorating? can't you have been meliorating? can't he have been meliorating? can't we have been meliorating? can't you have been meliorating? can't they have been meliorating?