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title: Some go away: how many went, how many at first — a lesson of Mova's school · trees and pragmatics
description: «Some go away: how many went, how many at first», a lesson of the lessons course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: In a story where some things go away we know two of three numbers: how many at first, how many went, how many are left.
---

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# Some go away: how many went, how many at first

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Lesson 74 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/74-separate-change-start-unknown/0/) — In a story where some things go away we know two of three numbers: how many at first, how many went, how many are left.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/74-separate-change-start-unknown/1/) — If the start and the rest are known, the ones that went are the start take away the rest: 20 at first, 13 left, so 20 - 13 = 7 went.
- [2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/74-separate-change-start-unknown/2/) — If the ones that went and the rest are known, the start is the rest and the ones that went put back together: 7 went, 13 left, so 13 + 7 = 20 at first.

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