---
title: Ages: in how many years will one be twice or three times as old — a lesson of Mova's school · trees and pragmatics
description: «Ages: in how many years will one be twice or three times as old», a lesson of the lessons course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: The difference between two ages never changes: every year both people get one year older.
---

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# Ages: in how many years will one be twice or three times as old

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Lesson 158 of the lessons course of Mova's primary school: 4 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/158-ages-how-many-times/0/) — The difference between two ages never changes: every year both people get one year older.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/158-ages-how-many-times/1/) — When a mother is twice as old as her son, the difference equals the son's age then.
- [2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/158-ages-how-many-times/2/) — Mother 32, son 8: the difference is 24, so the son will be 24, which is in 24 - 8 = 16 years.
- [3](https://md.mova.elamur.ai/free/en/corpora/school/lessons/158-ages-how-many-times/3/) — When she is three times as old, the difference is two of the son's ages: 24 ÷ 2 = 12, so the son will be 12, in 12 - 8 = 4 years.

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