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 | invent | 
|---|---|
| you | invent | 
| he/she/it | invents | 
| we | invent | 
| you | invent | 
| they | invent | 
| I | invented | 
|---|---|
| you | invented | 
| he/she/it | invented | 
| we | invented | 
| you | invented | 
| they | invented | 
| I | have | invented | 
|---|---|---|
| you | have | invented | 
| he/she/it | has | invented | 
| we | have | invented | 
| you | have | invented | 
| they | have | invented | 
| I | had | invented | 
|---|---|---|
| you | had | invented | 
| he/she/it | had | invented | 
| we | had | invented | 
| you | had | invented | 
| they | had | invented | 
 
  
 