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