I can blush you can blush she can blush we can blush you can blush they can blush
V-ing form
I can be blushing you can be blushing she can be blushing we can be blushing you can be blushing they can be blushing
Perfect
I can have blushed you can have blushed she can have blushed we can have blushed you can have blushed they can have blushed
V-ing perfect
I can have been blushing you can have been blushing she can have been blushing we can have been blushing you can have been blushing they can have been blushing
Negation
Simple form
I can't blush you can't blush she can't blush we can't blush you can't blush they can't blush
V-ing form
I can't be blushing you can't be blushing she can't be blushing we can't be blushing you can't be blushing they can't be blushing
Perfect
I can't have blushed you can't have blushed she can't have blushed we can't have blushed you can't have blushed they can't have blushed
V-ing perfect
I can't have been blushing you can't have been blushing she can't have been blushing we can't have been blushing you can't have been blushing they can't have been blushing
Interrogative form
Simple form
can I blush? can you blush? can she blush? can we blush? can you blush? can they blush?
V-ing form
can I be blushing? can you be blushing? can she be blushing? can we be blushing? can you be blushing? can they be blushing?
Perfect
can I have blushed? can you have blushed? can she have blushed? can we have blushed? can you have blushed? can they have blushed?
V-ing perfect
can I have been blushing? can you have been blushing? can she have been blushing? can we have been blushing? can you have been blushing? can they have been blushing?
Interro-negative form
Simple form
can't I blush? can't you blush? can't she blush? can't we blush? can't you blush? can't they blush?
V-ing form
can't I be blushing? can't you be blushing? can't she be blushing? can't we be blushing? can't you be blushing? can't they be blushing?
Perfect
can't I have blushed? can't you have blushed? can't she have blushed? can't we have blushed? can't you have blushed? can't they have blushed?
V-ing perfect
can't I have been blushing? can't you have been blushing? can't she have been blushing? can't we have been blushing? can't you have been blushing? can't they have been blushing?