---
title: If two ages add up to 20 and one child is 4 years older, the younger… — Ages that grow together: sum and difference · tree and pragmatics
description: If two ages add up to 20 and one child is 4 years older, the younger is (20 − 4) ÷ 2 = 8. Who acts: two ages, one child, younger. A sentence of the lesson «Ages that grow together: sum and difference» of the lessons course of Mova's primary school with its dependency tree and the pragmatics of every
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/lessons/140-ages-sum-and-difference/1/)

<!-- crumbs -->
[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/) / [Ages that grow together: sum and diffe…](https://md.mova.elamur.ai/free/en/corpora/school/lessons/140-ages-sum-and-difference/) / 1

# Ages that grow together: sum and difference, sentence 1

<!-- .ven lang=en -->
If two ages add up to 20 and one child is 4 years older, the younger is (20 − 4) ÷ 2 = 8.

<!-- .vintro -->
**Who acts:** two ages, one child, younger · **What happens:** add up, be

<!-- .vabout -->
This is a sentence of the lesson «Ages that grow together: sum and difference» of the lessons course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (two ages, one child, younger), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:lessons:140-ages-sum-and-difference.lesson:1
# text = If two ages add up to 20 and one child is 4 years older, the younger is (20 − 4) ÷ 2 = 8.
# source = school lesson (ours)
# course = lessons
# lesson = 140-ages-sum-and-difference.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R6-punct-agree ×1, R8-pos-agree ×1
1	If	if	SCONJ	IN	_	4	mark	_	_
2	two	two	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	ages	age	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	add	add	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	18	advcl	_	_
5	up	up	ADP	RP	_	4	compound:prt	_	_
6	to	to	ADP	IN	_	7	case	_	_
7	20	20	NUM	CD	NumForm=Digit|NumType=Card	4	obl	_	_
8	and	and	CCONJ	CC	_	14	cc	_	_
9	one	one	NUM	CD	NumForm=Word|NumType=Card	10	nummod	_	_
10	child	child	NOUN	NN	Number=Sing	14	nsubj	_	_
11	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	cop	_	_
12	4	4	NUM	CD	NumForm=Digit|NumType=Card	13	nummod	_	_
13	years	year	NOUN	NNS	Number=Plur	14	obl:unmarked	_	_
14	older	old	ADJ	JJR	Degree=Cmp	7	conj	_	_
15	,	,	PUNCT	,	_	4	punct	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	younger	young	ADJ	JJR	Degree=Cmp	18	nsubj	_	Agree=R8-pos-agree|Haiku=18:nsubj|HaikuPos=NOUN:NN:Number=Sing
18	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
19	(	(	PUNCT	-LRB-	_	20	punct	_	Agree=R6-punct-agree|Haiku=21:punct
20	20	20	NUM	CD	NumForm=Digit|NumType=Card	21	nummod	_	_
21	−	−	SYM	SYM	Number=Sing	18	nsubj	_	_
22	4	4	NUM	CD	NumForm=Digit|NumType=Card	21	flat	_	_
23	)	)	PUNCT	-RRB-	_	21	punct	_	_
24	÷	÷	SYM	SYM	_	25	dep	_	_
25	2	2	NUM	CD	NumForm=Digit|NumType=Card	18	conj	_	_
26	=	=	SYM	SYM	_	25	dep	_	_
27	8	8	NUM	CD	NumForm=Digit|NumType=Card	25	nmod	_	_
28	.	.	PUNCT	.	_	18	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **add up** *speech: assert* *a condition, not said to happen* | present | two ages |  |  |  |  | to 20 | vn mix-22.1-2 «NP V ADVP-Middle PP»: agent=Patient to 20=Co-Patient |
| 2 | **is** | present | one child |  |  |  | year | old *property* | tree rules |
| 3 | **be** | present | the younger |  |  |  |  |  | vn exist-47.1 «NP V»: agent=Theme |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

<!-- div src -->

**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:lessons:140-ages-sum-and-difference.lesson:1`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R6-punct-agree ×1, R8-pos-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

<!-- /div -->

<!-- pn -->
- ← previous: [Ages that grow together: sum and diffe…, 0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/140-ages-sum-and-difference/0/)
- next →: [Ages that grow together: sum and diffe…, 2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/140-ages-sum-and-difference/2/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/lessons/140-ages-sum-and-difference/)

