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 | trek | 
|---|---|
| you | trek | 
| he/she/it | treks | 
| we | trek | 
| you | trek | 
| they | trek | 
| I | trekked | 
|---|---|
| you | trekked | 
| he/she/it | trekked | 
| we | trekked | 
| you | trekked | 
| they | trekked | 
| I | have | trekked | 
|---|---|---|
| you | have | trekked | 
| he/she/it | has | trekked | 
| we | have | trekked | 
| you | have | trekked | 
| they | have | trekked | 
| I | had | trekked | 
|---|---|---|
| you | had | trekked | 
| he/she/it | had | trekked | 
| we | had | trekked | 
| you | had | trekked | 
| they | had | trekked | 
