---
title: Sound waves bend around corners and bounce off walls; light travels… — Thinking about noticing · tree and pragmatics
description: Sound waves bend around corners and bounce off walls; light travels in straight lines. Who acts: Sound waves, light. A sentence of the lesson «Thinking about noticing» of the everyday course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Thinking about noticing, sentence 13

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Sound waves bend around corners and bounce off walls; light travels in straight lines.

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**Who acts:** Sound waves, light · **What happens:** bend, bounce off, travel · **To what, where:** corners, walls, straight lines

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This is a sentence of the lesson «Thinking about noticing» of the everyday 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 (Sound waves, light), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:everyday:020-noticing-like-a-cat.lesson:13
# text = Sound waves bend around corners and bounce off walls; light travels in straight lines.
# source = school lesson (ours)
# course = everyday
# lesson = 020-noticing-like-a-cat.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): R8-pos-agree ×1
1	Sound	sound	NOUN	NN	Number=Sing	2	compound	_	Agree=R8-pos-agree|Haiku=2:compound|HaikuPos=PROPN:NNP:Number=Sing
2	waves	wave	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	bend	bend	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	around	around	ADP	IN	_	5	case	_	_
5	corners	corner	NOUN	NNS	Number=Plur	3	obl	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	bounce	bounce	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
8	off	off	ADP	IN	_	9	case	_	_
9	walls	wall	NOUN	NNS	Number=Plur	7	obl	_	_
10	;	;	PUNCT	,	_	3	punct	_	_
11	light	light	NOUN	NN	Number=Sing	12	nsubj	_	_
12	travels	travel	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	parataxis	_	_
13	in	in	ADP	IN	_	15	case	_	_
14	straight	straight	ADJ	JJ	Degree=Pos	15	amod	_	_
15	lines	line	NOUN	NNS	Number=Plur	12	obl	_	_
16	.	.	PUNCT	.	_	3	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 | **bend** | present | Sound waves |  |  | corners |  |  | vn assuming\_position-50 «NP V PP.location»: agent=Agent around corner=Location |
| 2 | **bounce off** | present | Sound waves *not said here* | walls |  |  |  |  | vn run-51.3.2-2 «NP V NP»: agent=Agent wall=Agent |
| 3 | **travel** | present | light |  |  | straight lines |  |  | vn run-51.3.2-1 «NP V PP.location»: agent=Theme in line=Trajectory |

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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:everyday:020-noticing-like-a-cat.lesson:13`.

**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): 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/).

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