 
  
 | I | unbutton | 
|---|---|
| you | unbutton | 
| he/she/it | unbuttons | 
| we | unbutton | 
| you | unbutton | 
| they | unbutton | 
| I | unbuttoned | 
|---|---|
| you | unbuttoned | 
| he/she/it | unbuttoned | 
| we | unbuttoned | 
| you | unbuttoned | 
| they | unbuttoned | 
| I | have | unbuttoned | 
|---|---|---|
| you | have | unbuttoned | 
| he/she/it | has | unbuttoned | 
| we | have | unbuttoned | 
| you | have | unbuttoned | 
| they | have | unbuttoned | 
| I | had | unbuttoned | 
|---|---|---|
| you | had | unbuttoned | 
| he/she/it | had | unbuttoned | 
| we | had | unbuttoned | 
| you | had | unbuttoned | 
| they | had | unbuttoned | 
无例句可用
请尝试其他条目。
 
  
 