 
  
 I. less·en [ˈlesən] 动词 不及物动词
II. less·en [ˈlesən] 动词 trans
| I | lessen | 
|---|---|
| you | lessen | 
| he/she/it | lessens | 
| we | lessen | 
| you | lessen | 
| they | lessen | 
| I | lessened | 
|---|---|
| you | lessened | 
| he/she/it | lessened | 
| we | lessened | 
| you | lessened | 
| they | lessened | 
| I | have | lessened | 
|---|---|---|
| you | have | lessened | 
| he/she/it | has | lessened | 
| we | have | lessened | 
| you | have | lessened | 
| they | have | lessened | 
| I | had | lessened | 
|---|---|---|
| you | had | lessened | 
| he/she/it | had | lessened | 
| we | had | lessened | 
| you | had | lessened | 
| they | had | lessened | 
 
  
 