I. lighten1 [ˈlaıtən] 动词 trans
| I | lighten | 
|---|---|
| you | lighten | 
| he/she/it | lightens | 
| we | lighten | 
| you | lighten | 
| they | lighten | 
| I | lightened | 
|---|---|
| you | lightened | 
| he/she/it | lightened | 
| we | lightened | 
| you | lightened | 
| they | lightened | 
| I | have | lightened | 
|---|---|---|
| you | have | lightened | 
| he/she/it | has | lightened | 
| we | have | lightened | 
| you | have | lightened | 
| they | have | lightened | 
| I | had | lightened | 
|---|---|---|
| you | had | lightened | 
| he/she/it | had | lightened | 
| we | had | lightened | 
| you | had | lightened | 
| they | had | lightened | 
