---
title: Which is true about the air you breathe out? — Air and why we need it · tree and pragmatics
description: Which is true about the air you breathe out? Test 3 · ★ of lesson 17 «Air and why we need it» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Test 3 · ★ · Air and why we need it

<!-- .ven lang=en -->
Which is true about the air you breathe out?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you · **What happens:** be, breathe out · **To what, where:** air

<!-- .vabout -->
This is test 3 · ★ of lesson 17 «Air and why we need it» of the world course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/world/17-air-oxygen-carbon-dioxide/#t3).

## The question {#question}

```conllu
# sent_id = question:world:17-air-oxygen-carbon-dioxide:t3:1
# text = Which is true about the air you breathe out?
1	Which	which	PRON	WDT	PronType=Rel	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	true	true	ADJ	JJ	Degree=Pos	0	root	_	_
4	about	about	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	air	air	NOUN	NN	Number=Sing	3	obl	_	_
7	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	8	nsubj	_	_
8	breathe	breathe	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	6	acl:relcl	_	_
9	out	out	ADP	RP	_	8	compound:prt	_	SpaceAfter=No
10	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present |  |  |  |  |  | about the air; true *property* | tree rules |
| 2 | **breathe out** | present | you | the air *not said here* |  |  |  |  | vn breathe-40.1.2-1 «NP V NP»: agent=Agent air=Theme |

<!-- .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.

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
It still has some oxygen, but less than before

```conllu
# sent_id = question:world:17-air-oxygen-carbon-dioxide:t3:o1:1
# text = It still has some oxygen, but less than before
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	still	still	ADV	RB	_	3	advmod	_	_
3	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	some	some	DET	DT	PronType=Ind	5	det	_	_
5	oxygen	oxygen	NOUN	NN	Number=Sing	3	obj	_	SpaceAfter=No
6	,	,	PUNCT	,	_	8	punct	_	_
7	but	but	CCONJ	CC	_	8	cc	_	_
8	less	less	ADJ	JJR	Degree=Cmp	3	parataxis	_	_
9	than	than	ADP	IN	_	10	case	_	_
10	before	before	ADV	RB	_	8	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | It | some oxygen |  |  | still |  | vn birth-28.2-1 «NP V NP»: agent=Agent oxygen=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
It has no oxygen in it at all

```conllu
# sent_id = question:world:17-air-oxygen-carbon-dioxide:t3:o2:1
# text = It has no oxygen in it at all
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	no	no	DET	DT	PronType=Neg	4	det	_	_
4	oxygen	oxygen	NOUN	NN	Number=Sing	2	obj	_	_
5	in	in	ADP	IN	_	6	case	_	_
6	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	obl	_	_
7	at	at	ADP	IN	_	8	case	_	_
8	all	all	DET	DT	PronType=Tot	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | It | no oxygen |  | oxygen |  | at all | vn birth-28.2-1 «NP V NP»: agent=Agent oxygen=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
It has more oxygen than the air you breathed in

```conllu
# sent_id = question:world:17-air-oxygen-carbon-dioxide:t3:o3:1
# text = It has more oxygen than the air you breathed in
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	more	more	ADJ	JJR	Degree=Cmp	4	amod	_	_
4	oxygen	oxygen	NOUN	NN	Number=Sing	2	obj	_	_
5	than	than	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	air	air	NOUN	NN	Number=Sing	4	nmod	_	_
8	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	9	nsubj	_	_
9	breathed	breathe	VERB	VBD	Mood=Ind|Number=Sing|Person=2|Tense=Past|VerbForm=Fin	7	acl:relcl	_	_
10	in	in	ADV	RB	_	9	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | It | more oxygen |  |  |  | than the air | vn birth-28.2-1 «NP V NP»: agent=Agent oxygen=Patient |
| 2 | **breathe in** | past | you | the air *not said here* |  |  |  |  | vn breathe-40.1.2-1 «NP V NP»: agent=Agent air=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
It is pure carbon dioxide

```conllu
# sent_id = question:world:17-air-oxygen-carbon-dioxide:t3:o4:1
# text = It is pure carbon dioxide
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	5	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	pure	pure	ADJ	JJ	Degree=Pos	5	amod	_	_
4	carbon	carbon	NOUN	NN	Number=Sing	5	compound	_	_
5	dioxide	dioxide	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | It | pure carbon dioxide |  |  |  |  | tree rules |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

<!-- /div -->

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