---
title: Toast turns brown because sugars and proteins react into new substan… — Changes you can undo and changes you can't · tree and pragmatics
description: Toast turns brown because sugars and proteins react into new substances; burnt toast is black because it has partly turned into carbon. Who acts: Toast, sugars, burnt toast. A sentence of the lesson «Changes you can undo and changes you can't» of the chemistry course of Mova's primary school with it
---

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# Changes you can undo and changes you can't, sentence 11

<!-- .ven lang=en -->
Toast turns brown because sugars and proteins react into new substances; burnt toast is black because it has partly turned into carbon.

<!-- .vintro -->
**Who acts:** Toast, sugars, burnt toast · **What happens:** turn, react, burn, be · **To what, where:** new substances, carbon

<!-- .vabout -->
This is a sentence of the lesson «Changes you can undo and changes you can't» 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 (Toast, sugars, burnt toast), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:009-changes-you-can-and-cannot-undo.lesson:11
# text = Toast turns brown because sugars and proteins react into new substances; burnt toast is black because it has partly turned into carbon.
# source = school lesson (ours)
# course = chemistry
# lesson = 009-changes-you-can-and-cannot-undo.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): R7-rel-agree ×1, R8-pos-agree ×1
1	Toast	toast	NOUN	NN	Number=Sing	2	nsubj	_	_
2	turns	turn	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	brown	brown	ADJ	JJ	Degree=Pos	2	xcomp	_	_
4	because	because	SCONJ	IN	_	8	mark	_	_
5	sugars	sugar	NOUN	NNS	Number=Plur	8	nsubj	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	proteins	protein	NOUN	NNS	Number=Plur	5	conj	_	_
8	react	react	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	advcl	_	_
9	into	into	ADP	IN	_	11	case	_	_
10	new	new	ADJ	JJ	Degree=Pos	11	amod	_	_
11	substances	substance	NOUN	NNS	Number=Plur	8	obl	_	_
12	;	;	PUNCT	,	_	16	punct	_	_
13	burnt	burn	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	14	amod	_	Agree=R8-pos-agree|Haiku=14:amod|HaikuPos=ADJ:JJ:Degree=Pos
14	toast	toast	NOUN	NN	Number=Sing	16	nsubj	_	_
15	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	16	cop	_	_
16	black	black	ADJ	JJ	Degree=Pos	2	parataxis	_	Agree=R7-rel-agree|Haiku=2:conj
17	because	because	SCONJ	IN	_	21	mark	_	_
18	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	21	nsubj	_	_
19	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	21	aux	_	_
20	partly	partly	ADV	RB	_	21	advmod	_	_
21	turned	turn	VERB	VBN	Tense=Past|VerbForm=Part	16	advcl	_	_
22	into	into	ADP	IN	_	23	case	_	_
23	carbon	carbon	NOUN	NN	Number=Sing	21	obl	_	_
24	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- 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 | **turn** | present | Toast |  |  |  |  | brown *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |
| 2 | **react** | present | sugars and proteins |  |  | new substances |  |  | vn respond-113 «NP V»: agent=Agent |
| 3 | **burn** | participle |  |  |  |  |  |  | vn light\_emission-43.1 «NP V»: agent=Theme |
| 4 | **is** | present | burnt toast |  |  |  |  | black *property* | tree rules |
| 5 | **turn** | present · perfect | Toast |  |  | carbon |  | partly *property* | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme into carbon=Trajectory |

<!-- .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:009-changes-you-can-and-cannot-undo.lesson:11`.

**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): R7-rel-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/).

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