| I | perforate | 
|---|---|
| you | perforate | 
| he/she/it | perforates | 
| we | perforate | 
| you | perforate | 
| they | perforate | 
| I | perforated | 
|---|---|
| you | perforated | 
| he/she/it | perforated | 
| we | perforated | 
| you | perforated | 
| they | perforated | 
| I | have | perforated | 
|---|---|---|
| you | have | perforated | 
| he/she/it | has | perforated | 
| we | have | perforated | 
| you | have | perforated | 
| they | have | perforated | 
| I | had | perforated | 
|---|---|---|
| you | had | perforated | 
| he/she/it | had | perforated | 
| we | had | perforated | 
| you | had | perforated | 
| they | had | perforated | 
无例句可用
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