I can sunbathe you can sunbathe he can sunbathe we can sunbathe you can sunbathe they can sunbathe
V-ing form
I can be sunbathing you can be sunbathing he can be sunbathing we can be sunbathing you can be sunbathing they can be sunbathing
Perfect
I can have sunbathed you can have sunbathed he can have sunbathed we can have sunbathed you can have sunbathed they can have sunbathed
V-ing perfect
I can have been sunbathing you can have been sunbathing he can have been sunbathing we can have been sunbathing you can have been sunbathing they can have been sunbathing
Negation
Simple form
I cannot sunbathe you cannot sunbathe he cannot sunbathe we cannot sunbathe you cannot sunbathe they cannot sunbathe
V-ing form
I cannot be sunbathing you cannot be sunbathing he cannot be sunbathing we cannot be sunbathing you cannot be sunbathing they cannot be sunbathing
Perfect
I cannot have sunbathed you cannot have sunbathed he cannot have sunbathed we cannot have sunbathed you cannot have sunbathed they cannot have sunbathed
V-ing perfect
I cannot have been sunbathing you cannot have been sunbathing he cannot have been sunbathing we cannot have been sunbathing you cannot have been sunbathing they cannot have been sunbathing
Interrogative form
Simple form
can I sunbathe? can you sunbathe? can he sunbathe? can we sunbathe? can you sunbathe? can they sunbathe?
V-ing form
can I be sunbathing? can you be sunbathing? can he be sunbathing? can we be sunbathing? can you be sunbathing? can they be sunbathing?
Perfect
can I have sunbathed? can you have sunbathed? can he have sunbathed? can we have sunbathed? can you have sunbathed? can they have sunbathed?
V-ing perfect
can I have been sunbathing? can you have been sunbathing? can he have been sunbathing? can we have been sunbathing? can you have been sunbathing? can they have been sunbathing?
Interro-negative form
Simple form
can I not sunbathe? can you not sunbathe? can he not sunbathe? can we not sunbathe? can you not sunbathe? can they not sunbathe?
V-ing form
can I not be sunbathing? can you not be sunbathing? can he not be sunbathing? can we not be sunbathing? can you not be sunbathing? can they not be sunbathing?
Perfect
can I not have sunbathed? can you not have sunbathed? can he not have sunbathed? can we not have sunbathed? can you not have sunbathed? can they not have sunbathed?
V-ing perfect
can I not have been sunbathing? can you not have been sunbathing? can he not have been sunbathing? can we not have been sunbathing? can you not have been sunbathing? can they not have been sunbathing?