I can chain-smoke you can chain-smoke she can chain-smoke we can chain-smoke you can chain-smoke they can chain-smoke
V-ing form
I can be chain-smoking you can be chain-smoking she can be chain-smoking we can be chain-smoking you can be chain-smoking they can be chain-smoking
Perfect
I can have chain-smoked you can have chain-smoked she can have chain-smoked we can have chain-smoked you can have chain-smoked they can have chain-smoked
V-ing perfect
I can have been chain-smoking you can have been chain-smoking she can have been chain-smoking we can have been chain-smoking you can have been chain-smoking they can have been chain-smoking
Negation
Simple form
I cannot chain-smoke you cannot chain-smoke she cannot chain-smoke we cannot chain-smoke you cannot chain-smoke they cannot chain-smoke
V-ing form
I cannot be chain-smoking you cannot be chain-smoking she cannot be chain-smoking we cannot be chain-smoking you cannot be chain-smoking they cannot be chain-smoking
Perfect
I cannot have chain-smoked you cannot have chain-smoked she cannot have chain-smoked we cannot have chain-smoked you cannot have chain-smoked they cannot have chain-smoked
V-ing perfect
I cannot have been chain-smoking you cannot have been chain-smoking she cannot have been chain-smoking we cannot have been chain-smoking you cannot have been chain-smoking they cannot have been chain-smoking
Interrogative form
Simple form
can I chain-smoke? can you chain-smoke? can she chain-smoke? can we chain-smoke? can you chain-smoke? can they chain-smoke?
V-ing form
can I be chain-smoking? can you be chain-smoking? can she be chain-smoking? can we be chain-smoking? can you be chain-smoking? can they be chain-smoking?
Perfect
can I have chain-smoked? can you have chain-smoked? can she have chain-smoked? can we have chain-smoked? can you have chain-smoked? can they have chain-smoked?
V-ing perfect
can I have been chain-smoking? can you have been chain-smoking? can she have been chain-smoking? can we have been chain-smoking? can you have been chain-smoking? can they have been chain-smoking?
Interro-negative form
Simple form
can I not chain-smoke? can you not chain-smoke? can she not chain-smoke? can we not chain-smoke? can you not chain-smoke? can they not chain-smoke?
V-ing form
can I not be chain-smoking? can you not be chain-smoking? can she not be chain-smoking? can we not be chain-smoking? can you not be chain-smoking? can they not be chain-smoking?
Perfect
can I not have chain-smoked? can you not have chain-smoked? can she not have chain-smoked? can we not have chain-smoked? can you not have chain-smoked? can they not have chain-smoked?
V-ing perfect
can I not have been chain-smoking? can you not have been chain-smoking? can she not have been chain-smoking? can we not have been chain-smoking? can you not have been chain-smoking? can they not have been chain-smoking?