---
title: In a fair test you change only one thing and keep everything else th… — The fizz: vinegar, lemon and soda · tree and pragmatics
description: In a fair test you change only one thing and keep everything else the same, and scientists repeat tests to make sure a result was not luck. Who acts: you, scientists, result. A sentence of the lesson «The fizz: vinegar, lemon and soda» of the chemistry course of Mova's primary school with its depend
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/chemistry/18-the-fizz-vinegar-lemon-and-soda/21/)

<!-- 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/) / [Chemistry](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/) / [The fizz: vinegar, lemon and soda](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/18-the-fizz-vinegar-lemon-and-soda/) / 21

# The fizz: vinegar, lemon and soda, sentence 21

<!-- .ven lang=en -->
In a fair test you change only one thing and keep everything else the same, and scientists repeat tests to make sure a result was not luck.

<!-- .vintro -->
**Who acts:** you, scientists, result · **What happens:** change, keep, repeat, make, not be · **To what, where:** one thing, fair test, everything, tests, luck

<!-- .vabout -->
This is a sentence of the lesson «The fizz: vinegar, lemon and soda» 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 (you, scientists, result), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:018-the-fizz-vinegar-lemon-and-soda.lesson:21
# text = In a fair test you change only one thing and keep everything else the same, and scientists repeat tests to make sure a result was not luck.
# source = school lesson (ours)
# course = chemistry
# lesson = 018-the-fizz-vinegar-lemon-and-soda.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	In	in	ADP	IN	_	4	case	_	_
2	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
3	fair	fair	ADJ	JJ	Degree=Pos	4	amod	_	_
4	test	test	NOUN	NN	Number=Sing	6	obl	_	_
5	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	6	nsubj	_	_
6	change	change	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	0	root	_	_
7	only	only	ADV	RB	_	8	advmod	_	_
8	one	one	NUM	CD	NumForm=Word|NumType=Card	9	nummod	_	_
9	thing	thing	NOUN	NN	Number=Sing	6	obj	_	_
10	and	and	CCONJ	CC	_	11	cc	_	_
11	keep	keep	VERB	VB	VerbForm=Inf	6	conj	_	_
12	everything	everything	PRON	NN	Number=Sing|PronType=Tot	11	obj	_	_
13	else	else	ADV	RB	_	12	advmod	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
15	same	same	ADJ	JJ	Degree=Pos	11	xcomp	_	_
16	,	,	PUNCT	,	_	19	punct	_	_
17	and	and	CCONJ	CC	_	19	cc	_	_
18	scientists	scientist	NOUN	NNS	Number=Plur	19	nsubj	_	_
19	repeat	repeat	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	6	conj	_	_
20	tests	test	NOUN	NNS	Number=Plur	19	obj	_	_
21	to	to	PART	TO	_	22	mark	_	_
22	make	make	VERB	VB	VerbForm=Inf	19	advcl	_	_
23	sure	sure	ADJ	JJ	Degree=Pos	22	xcomp	_	_
24	a	a	DET	DT	Definite=Ind|PronType=Art	25	det	_	_
25	result	result	NOUN	NN	Number=Sing	28	nsubj	_	_
26	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	28	cop	_	_
27	not	not	PART	RB	Polarity=Neg	28	advmod	_	_
28	luck	luck	NOUN	NN	Number=Sing	23	ccomp	_	_
29	.	.	PUNCT	.	_	6	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 | **change** | present | you | one thing |  | a fair test |  |  | vn dress-41.1.1-1-1 «NP V NP»: agent=Agent thing=Patient |
| 2 | **keep** | infinitive | you *not said here* | everything |  |  |  | same *property* | vn keep-15.2 «NP V NP»: agent=Agent everything=Theme |
| 3 | **repeat** | present | scientists | tests |  |  |  |  | vn begin-55.1-1-1 «NP V NP»: agent=Agent test=Eventuality |
| 4 | **make** | to-infinitive | scientists *not said here* |  |  |  |  | sure *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset |
| 5 | **not** **is a** | past | a result | luck |  |  |  |  | tree rules |

<!-- .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:chemistry:018-the-fizz-vinegar-lemon-and-soda.lesson:21`.

**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/).

<!-- /div -->

<!-- pn -->
- ← previous: [The fizz: vinegar, lemon and soda, 20](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/18-the-fizz-vinegar-lemon-and-soda/20/)
- next →: [Fizzy drinks, Mentos and cola, 0](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/0/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/18-the-fizz-vinegar-lemon-and-soda/)