| I | unpin | 
|---|---|
| you | unpin | 
| he/she/it | unpins | 
| we | unpin | 
| you | unpin | 
| they | unpin | 
| I | unpinned | 
|---|---|
| you | unpinned | 
| he/she/it | unpinned | 
| we | unpinned | 
| you | unpinned | 
| they | unpinned | 
| I | have | unpinned | 
|---|---|---|
| you | have | unpinned | 
| he/she/it | has | unpinned | 
| we | have | unpinned | 
| you | have | unpinned | 
| they | have | unpinned | 
| I | had | unpinned | 
|---|---|---|
| you | had | unpinned | 
| he/she/it | had | unpinned | 
| we | had | unpinned | 
| you | had | unpinned | 
| they | had | unpinned | 
无例句可用
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