---
title: A family has a gas boiler. Why would a smoke alarm alone not protect… — Thinking it through: the science behin… · tree and pragmatics
description: A family has a gas boiler. Why would a smoke alarm alone not protect them from carbon monoxide? Test 6 · ★★★ of lesson 40 «Thinking it through: the science behind home safety» of the everyday course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option;
---

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# Test 6 · ★★★ · Thinking it through: the science behind home safety

<!-- .ven lang=en -->
A family has a gas boiler. Why would a smoke alarm alone not protect them from carbon monoxide?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** family, smoke alarm · **What happens:** have, not protect · **To what, where:** gas boiler, them

<!-- .vabout -->
This is test 6 · ★★★ of lesson 40 «Thinking it through: the science behind home safety» of the everyday 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/everyday/40-home-safety-reasoning/#t6).

## The question {#question}

<!-- .note -->
*Sentence 1:* A family has a gas boiler.

```conllu
# sent_id = question:everyday:40-home-safety-reasoning:t6:1
# text = A family has a gas boiler.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	family	family	NOUN	NN	Number=Sing	3	nsubj	_	_
3	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	gas	gas	NOUN	NN	Number=Sing	6	compound	_	_
6	boiler	boiler	NOUN	NN	Number=Sing	3	obj	_	SpaceAfter=No
7	.	.	PUNCT	.	_	3	punct	_	_
```

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

<!-- .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.

<!-- .note -->
*Sentence 2:* Why would a smoke alarm alone not protect them from carbon monoxide?

```conllu
# sent_id = question:everyday:40-home-safety-reasoning:t6:2
# text = Why would a smoke alarm alone not protect them from carbon monoxide?
1	Why	why	ADV	WRB	PronType=Int	8	advmod	_	_
2	would	would	AUX	MD	VerbForm=Fin	8	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	smoke	smoke	NOUN	NN	Number=Sing	5	compound	_	_
5	alarm	alarm	NOUN	NN	Number=Sing	8	nsubj	_	_
6	alone	alone	ADV	RB	_	5	advmod	_	_
7	not	not	PART	RB	Polarity=Neg	8	advmod	_	_
8	protect	protect	VERB	VB	VerbForm=Inf	0	root	_	_
9	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	8	obj	_	_
10	from	from	ADP	IN	_	12	case	_	_
11	carbon	carbon	NOUN	NN	Number=Sing	12	compound	_	_
12	monoxide	monoxide	NOUN	NN	Number=Sing	8	obl	_	SpaceAfter=No
13	?	?	PUNCT	.	_	8	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **protect** | would | a smoke alarm | them *= they* |  |  |  | from carbon monoxide | vn defend-72.3 «NP V NP PP.theme»: agent=Agent they=Beneficiary from monoxide=Theme |

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Carbon monoxide always comes with thick smoke you can see coming

```conllu
# sent_id = question:everyday:40-home-safety-reasoning:t6:o1:1
# text = Carbon monoxide always comes with thick smoke you can see coming
1	Carbon	carbon	NOUN	NN	Number=Sing	2	compound	_	_
2	monoxide	monoxide	NOUN	NN	Number=Sing	4	nsubj	_	_
3	always	always	ADV	RB	PronType=Tot	4	advmod	_	_
4	comes	come	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	with	with	ADP	IN	_	7	case	_	_
6	thick	thick	ADJ	JJ	Degree=Pos	7	amod	_	_
7	smoke	smoke	NOUN	NN	Number=Sing	4	obl	_	_
8	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	10	nsubj	_	_
9	can	can	AUX	MD	VerbForm=Fin	10	aux	_	_
10	see	see	VERB	VB	VerbForm=Inf	7	acl:relcl	_	_
11	coming	come	VERB	VBG	VerbForm=Ger	10	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **come** | present | Carbon monoxide |  |  |  |  | with thick smoke; always *property* | vn escape-51.1-1 «NP V»: agent=Theme |
| 2 | **see** | can | you | thick smoke *not said here* |  |  |  |  | tree rules |
| 3 | **come** | gerund | thick smoke *not said here* |  |  |  |  |  | vn escape-51.1-1 «NP V»: agent=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
Boilers cannot make any harmful gases

```conllu
# sent_id = question:everyday:40-home-safety-reasoning:t6:o2:1
# text = Boilers cannot make any harmful gases
1	Boilers	boiler	NOUN	NNS	Number=Plur	4	nsubj	_	_
2	can	can	AUX	MD	VerbForm=Fin	4	aux	_	SpaceAfter=No
3	not	not	PART	RB	Polarity=Neg	4	advmod	_	_
4	make	make	VERB	VB	VerbForm=Inf	0	root	_	_
5	any	any	DET	DT	PronType=Ind	7	det	_	_
6	harmful	harmful	ADJ	JJ	Degree=Pos	7	amod	_	_
7	gases	gas	NOUN	NNS	Number=Plur	4	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **make** | can | Boilers | any harmful gases |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset gas=Product |

### Option 3 {#o3}

<!-- .ven lang=en -->
Smoke alarms only work in the kitchen

```conllu
# sent_id = question:everyday:40-home-safety-reasoning:t6:o3:1
# text = Smoke alarms only work in the kitchen
1	Smoke	smoke	NOUN	NN	Number=Sing	2	compound	_	_
2	alarms	alarm	NOUN	NNS	Number=Plur	4	nsubj	_	_
3	only	only	ADV	RB	_	4	advmod	_	_
4	work	work	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	in	in	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	kitchen	kitchen	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **work** | present | Smoke alarms |  |  |  |  | in the kitchen | vn employment-95.3 «NP V PP.theme»: agent=Agent in kitchen=Theme |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
Carbon monoxide is not smoke and has no smell or colour

```conllu
# sent_id = question:everyday:40-home-safety-reasoning:t6:o4:1
# text = Carbon monoxide is not smoke and has no smell or colour
1	Carbon	carbon	NOUN	NN	Number=Sing	2	compound	_	_
2	monoxide	monoxide	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
5	smoke	smoke	NOUN	NN	Number=Sing	0	root	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	conj	_	_
8	no	no	DET	DT	PronType=Neg	9	det	_	_
9	smell	smell	NOUN	NN	Number=Sing	7	obj	_	_
10	or	or	CCONJ	CC	_	11	cc	_	_
11	colour	colour	NOUN	NN	Number=Sing	9	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **is a** | present | Carbon monoxide | smoke |  |  |  |  | tree rules |
| 2 | **have** | present | Carbon monoxide *not said here* | no smell or colour |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent smell=Patient |

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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.

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- ← previous: [Thinking it through: the science behin…, test 5](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/40-home-safety-reasoning/t5/)
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