as·cer·tain [ˌæsəˈteɪn, 美 -ɚˈ-] 动词 trans 书
| I | ascertain |
|---|---|
| you | ascertain |
| he/she/it | ascertains |
| we | ascertain |
| you | ascertain |
| they | ascertain |
| I | ascertained |
|---|---|
| you | ascertained |
| he/she/it | ascertained |
| we | ascertained |
| you | ascertained |
| they | ascertained |
| I | have | ascertained |
|---|---|---|
| you | have | ascertained |
| he/she/it | has | ascertained |
| we | have | ascertained |
| you | have | ascertained |
| they | have | ascertained |
| I | had | ascertained |
|---|---|---|
| you | had | ascertained |
| he/she/it | had | ascertained |
| we | had | ascertained |
| you | had | ascertained |
| they | had | ascertained |