---
title: A free bubble always becomes a sphere, because a sphere holds the ai… — Soap and why washing works · tree and pragmatics
description: A free bubble always becomes a sphere, because a sphere holds the air inside with the smallest surface; even square wire frames make round bubbles. Who acts: free bubble, sphere, square wire frames. A sentence of the lesson «Soap and why washing works» of the chemistry course of Mova's primary schoo
---

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# Soap and why washing works, sentence 13

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A free bubble always becomes a sphere, because a sphere holds the air inside with the smallest surface; even square wire frames make round bubbles.

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**Who acts:** free bubble, sphere, square wire frames · **What happens:** become, hold, make · **To what, where:** sphere, air, round bubbles

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This is a sentence of the lesson «Soap and why washing works» of the chemistry 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 (free bubble, sphere, square wire frames), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:024-soap-and-why-washing-works.lesson:13
# text = A free bubble always becomes a sphere, because a sphere holds the air inside with the smallest surface; even square wire frames make round bubbles.
# source = school lesson (ours)
# course = chemistry
# lesson = 024-soap-and-why-washing-works.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): R5-strong ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	free	free	ADJ	JJ	Degree=Pos	3	amod	_	_
3	bubble	bubble	NOUN	NN	Number=Sing	5	nsubj	_	_
4	always	always	ADV	RB	PronType=Tot	5	advmod	_	_
5	becomes	become	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	sphere	sphere	NOUN	NN	Number=Sing	5	xcomp	_	_
8	,	,	PUNCT	,	_	12	punct	_	_
9	because	because	SCONJ	IN	_	12	mark	_	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
11	sphere	sphere	NOUN	NN	Number=Sing	12	nsubj	_	_
12	holds	hold	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	advcl	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	air	air	NOUN	NN	Number=Sing	12	obj	_	_
15	inside	inside	ADV	RB	_	14	advmod	_	_
16	with	with	ADP	IN	_	19	case	_	_
17	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
18	smallest	small	ADJ	JJS	Degree=Sup	19	amod	_	_
19	surface	surface	NOUN	NN	Number=Sing	12	obl	_	Agree=R5-strong|Haiku=14:nmod
20	;	;	PUNCT	,	_	22	punct	_	_
21	even	even	ADV	RB	_	22	advmod	_	_
22	square	square	ADJ	JJ	Degree=Pos	24	amod	_	_
23	wire	wire	NOUN	NN	Number=Sing	24	compound	_	_
24	frames	frame	NOUN	NNS	Number=Plur	25	nsubj	_	_
25	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	parataxis	_	_
26	round	round	ADJ	JJ	Degree=Pos	27	amod	_	_
27	bubbles	bubble	NOUN	NNS	Number=Plur	25	obj	_	_
28	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

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

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **become** | present | a free bubble | a sphere |  |  |  | always *property* | vn become-109.1-1-1 «NP V PP.attribute»: agent=Patient |
| 2 | **hold** | present | a sphere | the air |  |  |  | with the smallest surface | vn keep-15.2 «NP V NP»: agent=Agent air=Theme |
| 3 | **make** | present | square wire frames | round bubbles |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset bubble=Product |

<!-- .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.

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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:chemistry:024-soap-and-why-washing-works.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): R5-strong ×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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