| I | chain-smoke | 
|---|---|
| you | chain-smoke | 
| he/she/it | chain-smokes | 
| we | chain-smoke | 
| you | chain-smoke | 
| they | chain-smoke | 
| I | chain-smoked | 
|---|---|
| you | chain-smoked | 
| he/she/it | chain-smoked | 
| we | chain-smoked | 
| you | chain-smoked | 
| they | chain-smoked | 
| I | have | chain-smoked | 
|---|---|---|
| you | have | chain-smoked | 
| he/she/it | has | chain-smoked | 
| we | have | chain-smoked | 
| you | have | chain-smoked | 
| they | have | chain-smoked | 
| I | had | chain-smoked | 
|---|---|---|
| you | had | chain-smoked | 
| he/she/it | had | chain-smoked | 
| we | had | chain-smoked | 
| you | had | chain-smoked | 
| they | had | chain-smoked | 
无例句可用
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