---
title: The sound we hear coming back is called an echo. — Sound — vibrations, loudness, pitch and echoes · tree and pragmatics
description: The sound we hear coming back is called an echo. Who acts: we, sound. A sentence of the lesson «Sound — vibrations, loudness, pitch and echoes» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Sound — vibrations, loudness, pitch and echoes, sentence 8

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The sound we hear coming back is called an echo.

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**Who acts:** we, sound · **What happens:** hear, come back, call · **To what, where:** sound · **Speech:** someone speaks here

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This is a sentence of the lesson «Sound — vibrations, loudness, pitch and echoes» of the world 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 (we, sound), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:054-sound.lesson:8
# text = The sound we hear coming back is called an echo.
# source = school lesson (ours)
# course = world
# lesson = 054-sound.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): no change
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	sound	sound	NOUN	NN	Number=Sing	8	nsubj:pass	_	_
3	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	4	nsubj	_	_
4	hear	hear	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	2	acl:relcl	_	_
5	coming	come	VERB	VBG	VerbForm=Ger	4	xcomp	_	_
6	back	back	ADV	RB	_	5	advmod	_	_
7	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	aux:pass	_	_
8	called	call	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
9	an	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
10	echo	echo	NOUN	NN	Number=Sing	8	xcomp	_	_
11	.	.	PUNCT	.	_	8	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hear** | present | we | the sound *not said here* |  |  |  |  | tree rules |
| 2 | **come back** | gerund | the sound *not said here* |  |  |  |  |  | vn escape-51.1-1 «NP V»: agent=Theme |
| 3 | **call** | present · passive |  | the sound |  |  |  |  | vn initiate\_communication-37.4.2-1 «NP V NP.recipient»: subject=Recipient |

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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.

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**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:world:054-sound.lesson:8`.

**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): no change. **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/).

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