http://www.pons.de/produkte/3-12-517841-X/(牛津大学出版社授权产品)
 
 在《PONS词典》中的词汇
 
 | I | sap | 
|---|---|
| you | sap | 
| he/she/it | saps | 
| we | sap | 
| you | sap | 
| they | sap | 
| I | sapped | 
|---|---|
| you | sapped | 
| he/she/it | sapped | 
| we | sapped | 
| you | sapped | 
| they | sapped | 
| I | have | sapped | 
|---|---|---|
| you | have | sapped | 
| he/she/it | has | sapped | 
| we | have | sapped | 
| you | have | sapped | 
| they | have | sapped | 
| I | had | sapped | 
|---|---|---|
| you | had | sapped | 
| he/she/it | had | sapped | 
| we | had | sapped | 
| you | had | sapped | 
| they | had | sapped |