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title: How long it takes on the clock — a lesson of Mova's school · trees and pragmatics
description: «How long it takes on the clock», 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 on from the start time to the next o'clock, then on to the end time.
---

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# How long it takes on the clock

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Lesson 226 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).

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- [0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/226-how-long-on-the-clock/0/) — To find how long something lasts, count on from the start time to the next o'clock, then on to the end time.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/226-how-long-on-the-clock/1/) — An hour has 60 minutes, so from a quarter past to the next o'clock is 60 − 15 = 45 minutes.
- [2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/226-how-long-on-the-clock/2/) — From 3:45 to 4:30: 15 minutes to 4:00, then 30 more, so 15 + 30 = 45 minutes.

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