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