| I | demarcate | 
|---|---|
| you | demarcate | 
| he/she/it | demarcates | 
| we | demarcate | 
| you | demarcate | 
| they | demarcate | 
| I | demarcated | 
|---|---|
| you | demarcated | 
| he/she/it | demarcated | 
| we | demarcated | 
| you | demarcated | 
| they | demarcated | 
| I | have | demarcated | 
|---|---|---|
| you | have | demarcated | 
| he/she/it | has | demarcated | 
| we | have | demarcated | 
| you | have | demarcated | 
| they | have | demarcated | 
| I | had | demarcated | 
|---|---|---|
| you | had | demarcated | 
| he/she/it | had | demarcated | 
| we | had | demarcated | 
| you | had | demarcated | 
| they | had | demarcated | 
无例句可用
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