| I | lengthen |
| you | lengthen |
| he/she/it | lengthens |
| we | lengthen |
| you | lengthen |
| they | lengthen |
| I | have lengthened |
| you | have lengthened |
| he/she/it | has lengthened |
| we | have lengthened |
| you | have lengthened |
| they | have lengthened |
| I | lengthened |
| you | lengthened |
| he/she/it | lengthened |
| we | lengthened |
| you | lengthened |
| they | lengthened |
| I | had lengthened |
| you | had lengthened |
| he/she/it | had lengthened |
| we | had lengthened |
| you | had lengthened |
| they | had lengthened |
| I | will lengthen |
| you | will lengthen |
| he/she/it | will lengthen |
| we | will lengthen |
| you | will lengthen |
| they | will lengthen |
| I | will have lengthened |
| you | will have lengthened |
| he/she/it | will have lengthened |
| we | will have lengthened |
| you | will have lengthened |
| they | will have lengthened |
| I | am lengthening |
| you | are lengthening |
| he/she/it | is lengthening |
| we | are lengthening |
| you | are lengthening |
| they | are lengthening |
| I | have been lengthening |
| you | have been lengthening |
| he/she/it | has been lengthening |
| we | have been lengthening |
| you | have been lengthening |
| they | have been lengthening |
| I | was lengthening |
| you | were lengthening |
| he/she/it | was lengthening |
| we | were lengthening |
| you | were lengthening |
| they | were lengthening |
| I | had been lengthening |
| you | had been lengthening |
| he/she/it | had been lengthening |
| we | had been lengthening |
| you | had been lengthening |
| they | had been lengthening |
| I | will be lengthening |
| you | will be lengthening |
| he/she/it | will be lengthening |
| we | will be lengthening |
| you | will be lengthening |
| they | will be lengthening |
| I | will have been lengthening |
| you | will have been lengthening |
| he/she/it | will have been lengthening |
| we | will have been lengthening |
| you | will have been lengthening |
| they | will have been lengthening |
| I | would lengthen |
| you | would lengthen |
| he/she/it | would lengthen |
| we | would lengthen |
| you | would lengthen |
| they | would lengthen |
| I | would have lengthened |
| you | would have lengthened |
| he/she/it | would have lengthened |
| we | would have lengthened |
| you | would have lengthened |
| they | would have lengthened |
| I | would be lengthening |
| you | would be lengthening |
| he/she/it | would be lengthening |
| we | would be lengthening |
| you | would be lengthening |
| they | would be lengthening |
| I | would have been lengthening |
| you | would have been lengthening |
| he/she/it | would have been lengthening |
| we | would have been lengthening |
| you | would have been lengthening |
| they | would have been lengthening |
| You | lengthen |
| we | Let's lengthen |
| You | lengthen |