---
title: In a fair test you change only one thing and keep everything else th… — How plants grow: seeds, light, water and air · tree and pragmatics
description: In a fair test you change only one thing and keep everything else the same. Who acts: you. A sentence of the lesson «How plants grow: seeds, light, water and air» of the biology course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# How plants grow: seeds, light, water and air, sentence 17

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In a fair test you change only one thing and keep everything else the same.

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**Who acts:** you · **What happens:** change, keep · **To what, where:** one thing, fair test, everything

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This is a sentence of the lesson «How plants grow: seeds, light, water and air» of the biology 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), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:056-how-plants-grow.lesson:17
# text = In a fair test you change only one thing and keep everything else the same.
# source = school lesson (ours)
# course = biology
# lesson = 056-how-plants-grow.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	.	_	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 |

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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:biology:056-how-plants-grow.lesson:17`.

**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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- ← previous: [How plants grow: seeds, light, water a…, 16](https://md.mova.elamur.ai/free/en/corpora/school/biology/56-how-plants-grow/16/)
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