| Bảng chia động từ |
| Số | Số it | Số nhiều |
| Ngôi | I | You | He/She/It | We | You | They |
| Hiện tại đơn | ascertain | ascertain | ascertains | ascertain | ascertain | ascertain |
| Hiện tại tiếp diễn | am ascertaining | are ascertaining | is ascertaining | are ascertaining | are ascertaining | are ascertaining |
| Quá khứ đơn | ascertained | ascertained | ascertained | ascertained | ascertained | ascertained |
| Quá khứ tiếp diễn | was ascertaining | were ascertaining | was ascertaining | were ascertaining | were ascertaining | were ascertaining |
| Hiện tại hoàn thành | have ascertained | have ascertained | has ascertained | have ascertained | have ascertained | have ascertained |
| Hiện tại hoàn thành tiếp diễn | have been ascertaining | have been ascertaining | has been ascertaining | have been ascertaining | have been ascertaining | have been ascertaining |
| Quá khứ hoàn thành | had ascertained | had ascertained | had ascertained | had ascertained | had ascertained | had ascertained |
| QK hoàn thành Tiếp diễn | had been ascertaining | had been ascertaining | had been ascertaining | had been ascertaining | had been ascertaining | had been ascertaining |
| Tương Lai | will ascertain | will ascertain | will ascertain | will ascertain | will ascertain | will ascertain |
| TL Tiếp Diễn | will be ascertaining | will be ascertaining | will be ascertaining | will be ascertaining | will be ascertaining | will be ascertaining |
| Tương Lai hoàn thành | will have ascertained | will have ascertained | will have ascertained | will have ascertained | will have ascertained | will have ascertained |
| TL HT Tiếp Diễn | will have been ascertaining | will have been ascertaining | will have been ascertaining | will have been ascertaining | will have been ascertaining | will have been ascertaining |
| Điều Kiện Cách Hiện Tại | would ascertain | would ascertain | would ascertain | would ascertain | would ascertain | would ascertain |
| Conditional Perfect | would have ascertained | would have ascertained | would have ascertained | would have ascertained | would have ascertained | would have ascertained |
| Conditional Present Progressive | would be ascertaining | would be ascertaining | would be ascertaining | would be ascertaining | would be ascertaining | would be ascertaining |
| Conditional Perfect Progressive | would have been ascertaining | would have been ascertaining | would have been ascertaining | would have been ascertaining | would have been ascertaining | would have been ascertaining |
| Present Subjunctive | ascertain | ascertain | ascertain | ascertain | ascertain | ascertain |
| Past Subjunctive | ascertained | ascertained | ascertained | ascertained | ascertained | ascertained |
| Past Perfect Subjunctive | had ascertained | had ascertained | had ascertained | had ascertained | had ascertained | had ascertained |
| Imperative | | ascertain | | Let′s ascertain | ascertain | |