II. tune [tjuːn] 动词 trans (up)
| I | tug |
|---|---|
| you | tug |
| he/she/it | tugs |
| we | tug |
| you | tug |
| they | tug |
| I | tugged |
|---|---|
| you | tugged |
| he/she/it | tugged |
| we | tugged |
| you | tugged |
| they | tugged |
| I | have | tugged |
|---|---|---|
| you | have | tugged |
| he/she/it | has | tugged |
| we | have | tugged |
| you | have | tugged |
| they | have | tugged |
| I | had | tugged |
|---|---|---|
| you | had | tugged |
| he/she/it | had | tugged |
| we | had | tugged |
| you | had | tugged |
| they | had | tugged |