| I | sing up |
|---|---|
| you | sing up |
| he/she/it | sings up |
| we | sing up |
| you | sing up |
| they | sing up |
| I | sang up |
|---|---|
| you | sang up |
| he/she/it | sang up |
| we | sang up |
| you | sang up |
| they | sang up |
| I | have | sung up |
|---|---|---|
| you | have | sung up |
| he/she/it | has | sung up |
| we | have | sung up |
| you | have | sung up |
| they | have | sung up |
| I | had | sung up |
|---|---|---|
| you | had | sung up |
| he/she/it | had | sung up |
| we | had | sung up |
| you | had | sung up |
| they | had | sung up |
无例句可用
请尝试其他词条。