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 can't chain-smoke you can't chain-smoke she can't chain-smoke we can't chain-smoke you can't chain-smoke they can't chain-smoke
V-ing form
I can't be chain-smoking you can't be chain-smoking she can't be chain-smoking we can't be chain-smoking you can't be chain-smoking they can't be chain-smoking
Perfect
I can't have chain-smoked you can't have chain-smoked she can't have chain-smoked we can't have chain-smoked you can't have chain-smoked they can't have chain-smoked
V-ing perfect
I can't have been chain-smoking you can't have been chain-smoking she can't have been chain-smoking we can't have been chain-smoking you can't have been chain-smoking they can't 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't I chain-smoke? can't you chain-smoke? can't she chain-smoke? can't we chain-smoke? can't you chain-smoke? can't they chain-smoke?
V-ing form
can't I be chain-smoking? can't you be chain-smoking? can't she be chain-smoking? can't we be chain-smoking? can't you be chain-smoking? can't they be chain-smoking?
Perfect
can't I have chain-smoked? can't you have chain-smoked? can't she have chain-smoked? can't we have chain-smoked? can't you have chain-smoked? can't they have chain-smoked?
V-ing perfect
can't I have been chain-smoking? can't you have been chain-smoking? can't she have been chain-smoking? can't we have been chain-smoking? can't you have been chain-smoking? can't they have been chain-smoking?