I can swing you can swing he can swing we can swing you can swing they can swing
V-ing form
I can be swinging you can be swinging he can be swinging we can be swinging you can be swinging they can be swinging
Perfect
I can have swung you can have swung he can have swung we can have swung you can have swung they can have swung
V-ing perfect
I can have been swinging you can have been swinging he can have been swinging we can have been swinging you can have been swinging they can have been swinging
Negation
Simple form
I cannot swing you cannot swing he cannot swing we cannot swing you cannot swing they cannot swing
V-ing form
I cannot be swinging you cannot be swinging he cannot be swinging we cannot be swinging you cannot be swinging they cannot be swinging
Perfect
I cannot have swung you cannot have swung he cannot have swung we cannot have swung you cannot have swung they cannot have swung
V-ing perfect
I cannot have been swinging you cannot have been swinging he cannot have been swinging we cannot have been swinging you cannot have been swinging they cannot have been swinging
Interrogative form
Simple form
can I swing? can you swing? can he swing? can we swing? can you swing? can they swing?
V-ing form
can I be swinging? can you be swinging? can he be swinging? can we be swinging? can you be swinging? can they be swinging?
Perfect
can I have swung? can you have swung? can he have swung? can we have swung? can you have swung? can they have swung?
V-ing perfect
can I have been swinging? can you have been swinging? can he have been swinging? can we have been swinging? can you have been swinging? can they have been swinging?
Interro-negative form
Simple form
can I not swing? can you not swing? can he not swing? can we not swing? can you not swing? can they not swing?
V-ing form
can I not be swinging? can you not be swinging? can he not be swinging? can we not be swinging? can you not be swinging? can they not be swinging?
Perfect
can I not have swung? can you not have swung? can he not have swung? can we not have swung? can you not have swung? can they not have swung?
V-ing perfect
can I not have been swinging? can you not have been swinging? can he not have been swinging? can we not have been swinging? can you not have been swinging? can they not have been swinging?