--- title: How long it lasts: from one clock time to another — a lesson of Mova's school · trees and pragmatics description: «How long it lasts: from one clock time to another», a lesson of the lessons course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: To find how long something lasts, count from the start time to the end time. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/lessons/153-time-intervals/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Lessons](https://md.mova.elamur.ai/free/en/corpora/school/lessons/) / How long it lasts: from one clock time… # How long it lasts: from one clock time to another Lesson 153 of the lessons course of Mova's primary school: 3 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). - [0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/153-time-intervals/0/) — To find how long something lasts, count from the start time to the end time. - [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/153-time-intervals/1/) — Count the minutes up to the next full hour, then the full hours, then the minutes after the last full hour. - [2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/153-time-intervals/2/) — From 9:40 to 11:15: 20 minutes to 10:00, 60 minutes to 11:00, and 15 more minutes: 20 + 60 + 15 = 95 minutes. - ← previous: [The whole from its fraction](https://md.mova.elamur.ai/free/en/corpora/school/lessons/152-the-whole-from-a-fraction/) - next →: [The calendar: days from one month into the next](https://md.mova.elamur.ai/free/en/corpora/school/lessons/154-calendar-across-months/) - ↑ back to [Lessons](https://md.mova.elamur.ai/free/en/corpora/school/lessons/)