| 展示 (Present) "lengthen" | I | lengthen | |
| 现在进行时 (Present Continuous) "lengthen" | I | am lengthening | |
| 一般过去时 (Simple past) "lengthen" | I | lengthened | |
| 过去进行时 (Past Continuous) "lengthen" | I | was lengthening | |
| 现在完成 (Present perfect) "lengthen" | I | have lengthened | |
| 现在完成进行时 (Present perfect continuous) "lengthen" | I | have been lengthening | |
| 过去完成时 (Past perfect) "lengthen" | I | had lengthened | |
| 过去完成时 (Past perfect continuous) "lengthen" | I | had been lengthening | |
| 未来 (Future) "lengthen" | I | will lengthen | |
| 将来进行时 (Future continuous) "lengthen" | I | will be lengthening | |
| 未来完美 (Future perfect) "lengthen" | I | will have lengthened | |
| 未来持续完善 (Future perfect continuous) "lengthen" | I | will have been lengthening |