在《PONS词典》中的词汇
underpin 动词 trans MKT-WB
under·ˈpin <-nn-> 动词 trans
2. underpin 引:
| I | underpin | |
|---|---|---|
| you | underpin | |
| he/she/it | underpins | |
| we | underpin | |
| you | underpin | |
| they | underpin |
| I | underpinned | |
|---|---|---|
| you | underpinned | |
| he/she/it | underpinned | |
| we | underpinned | |
| you | underpinned | |
| they | underpinned |
| I | have | underpinned | |
|---|---|---|---|
| you | have | underpinned | |
| he/she/it | has | underpinned | |
| we | have | underpinned | |
| you | have | underpinned | |
| they | have | underpinned |
| I | had | underpinned | |
|---|---|---|---|
| you | had | underpinned | |
| he/she/it | had | underpinned | |
| we | had | underpinned | |
| you | had | underpinned | |
| they | had | underpinned |