I. pre-ex·ist [ˌpri:ɪgˈzɪst] 书 动词 不及物动词
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-  präexistieren 技术用语
| I | pre-exist | 
|---|---|
| you | pre-exist | 
| he/she/it | pre-exists | 
| we | pre-exist | 
| you | pre-exist | 
| they | pre-exist | 
| I | pre-existed | 
|---|---|
| you | pre-existed | 
| he/she/it | pre-existed | 
| we | pre-existed | 
| you | pre-existed | 
| they | pre-existed | 
| I | have | pre-existed | 
|---|---|---|
| you | have | pre-existed | 
| he/she/it | has | pre-existed | 
| we | have | pre-existed | 
| you | have | pre-existed | 
| they | have | pre-existed | 
| I | had | pre-existed | 
|---|---|---|
| you | had | pre-existed | 
| he/she/it | had | pre-existed | 
| we | had | pre-existed | 
| you | had | pre-existed | 
| they | had | pre-existed | 
无例句可用
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