I. trail [treıl] 动词 不及物动词
| I | trail |
|---|---|
| you | trail |
| he/she/it | trails |
| we | trail |
| you | trail |
| they | trail |
| I | trailed |
|---|---|
| you | trailed |
| he/she/it | trailed |
| we | trailed |
| you | trailed |
| they | trailed |
| I | have | trailed |
|---|---|---|
| you | have | trailed |
| he/she/it | has | trailed |
| we | have | trailed |
| you | have | trailed |
| they | have | trailed |
| I | had | trailed |
|---|---|---|
| you | had | trailed |
| he/she/it | had | trailed |
| we | had | trailed |
| you | had | trailed |
| they | had | trailed |