---
title: Why do people on a boat trip need life jackets even if they can swim? — Safe at lakes and beaches · tree and pragmatics
description: Why do people on a boat trip need life jackets even if they can swim? Test 8 · ★★ of lesson 232 «Safe at lakes and beaches» of the everyday 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 8 · ★★ · Safe at lakes and beaches

<!-- .ven lang=en -->
Why do people on a boat trip need life jackets even if they can swim?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** people · **What happens:** need, swim · **To what, where:** life jackets

<!-- .vabout -->
This is test 8 · ★★ of lesson 232 «Safe at lakes and beaches» 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/232-lakes-and-beaches/#t8).

## The question {#question}

```conllu
# sent_id = question:everyday:232-lakes-and-beaches:t8:1
# text = Why do people on a boat trip need life jackets even if they can swim?
1	Why	why	ADV	WRB	PronType=Int	8	advmod	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	8	aux	_	_
3	people	people	NOUN	NNS	Number=Plur	8	nsubj	_	_
4	on	on	ADP	IN	_	7	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	boat	boat	NOUN	NN	Number=Sing	7	compound	_	_
7	trip	trip	NOUN	NN	Number=Sing	3	nmod	_	_
8	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	15	advcl	_	_
9	life	life	NOUN	NN	Number=Sing	10	compound	_	_
10	jackets	jacket	NOUN	NNS	Number=Plur	8	obj	_	_
11	even	even	ADV	RB	_	15	advmod	_	_
12	if	if	SCONJ	IN	_	15	mark	_	_
13	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	15	nsubj	_	_
14	can	can	AUX	MD	VerbForm=Fin	15	aux	_	_
15	swim	swim	VERB	VB	VerbForm=Inf	0	root	_	SpaceAfter=No
16	?	?	PUNCT	.	_	15	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present · do-support | people on a boat trip | life jackets |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot jacket=Theme |
| 2 | **swim** | can | people |  |  |  |  |  | vn run-51.3.2-1 «NP V»: agent=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 -->
Boats tip over, and a life jacket keeps you afloat when tired or hurt

<!-- fold The tree, 14 words -->
```conllu
# sent_id = question:everyday:232-lakes-and-beaches:t8:o1:1
# text = Boats tip over, and a life jacket keeps you afloat when tired or hurt
1	Boats	boat	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	tip	tip	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	over	over	ADV	RB	_	2	advmod	_	SpaceAfter=No
4	,	,	PUNCT	,	_	9	punct	_	_
5	and	and	CCONJ	CC	_	9	cc	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	life	life	NOUN	NN	Number=Sing	8	compound	_	_
8	jacket	jacket	NOUN	NN	Number=Sing	9	nsubj	_	_
9	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
10	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	9	obj	_	_
11	afloat	afloat	ADJ	JJ	Degree=Pos	9	xcomp	_	_
12	when	when	ADV	WRB	PronType=Int	13	advmod	_	_
13	tired	tired	ADJ	JJ	Degree=Pos	11	xcomp	_	_
14	or	or	CCONJ	CC	_	15	cc	_	_
15	hurt	hurt	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	11	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **tip over** | present | Boats |  |  |  |  | over *property* | vn throw-17.1-1-1 «NP V NP»: agent=Agent |
| 2 | **keep** | present | a life jacket | you |  |  |  | afloat *property* | vn keep-15.2 «NP V NP»: agent=Agent you=Theme |
| 3 | **hurt** | participle | a life jacket *not said here* |  |  |  |  |  | vn amuse-31.1 «NP V ADV-Middle»: agent=Experiencer |

### Option 2 {#o2}

<!-- .ven lang=en -->
Life jackets keep you warm when you sit out in the sun

```conllu
# sent_id = question:everyday:232-lakes-and-beaches:t8:o2:1
# text = Life jackets keep you warm when you sit out in the sun
1	Life	life	NOUN	NN	Number=Sing	2	compound	_	_
2	jackets	jacket	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	keep	keep	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	3	obj	_	_
5	warm	warm	ADJ	JJ	Degree=Pos	3	xcomp	_	_
6	when	when	ADV	WRB	PronType=Int	8	advmod	_	_
7	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	8	nsubj	_	_
8	sit	sit	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	3	advcl	_	_
9	out	out	ADP	RP	_	8	compound:prt	_	_
10	in	in	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	sun	sun	NOUN	NN	Number=Sing	8	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | Life jackets | you |  |  |  | warm *property* | vn keep-15.2 «NP V NP»: agent=Agent you=Theme |
| 2 | **sit out** | present | you |  |  | the sun |  |  | vn assuming\_position-50 «NP V PP.location»: agent=Agent in sun=Location |

### Option 3 {#o3}

<!-- .ven lang=en -->
They are just for show, so the photos look nice

```conllu
# sent_id = question:everyday:232-lakes-and-beaches:t8:o3:1
# text = They are just for show, so the photos look nice
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	5	nsubj	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	just	just	ADV	RB	_	5	advmod	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	show	show	NOUN	NN	Number=Sing	0	root	_	SpaceAfter=No
6	,	,	PUNCT	,	_	10	punct	_	_
7	so	so	ADV	RB	_	10	advmod	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	photos	photo	NOUN	NNS	Number=Plur	10	nsubj	_	_
10	look	look	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	acl:relcl	_	_
11	nice	nice	ADJ	JJ	Degree=Pos	10	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | They |  |  |  |  | for show | tree rules |
| 2 | **look** | present | the photos | show *not said here* |  |  |  | nice *property* | vn seem-109-1-1 «NP V NP»: agent=Theme show=Attribute |

### Option 4 {#o4}

<!-- .ven lang=en -->
Only bad swimmers ever fall into the water from boats

```conllu
# sent_id = question:everyday:232-lakes-and-beaches:t8:o4:1
# text = Only bad swimmers ever fall into the water from boats
1	Only	only	ADV	RB	_	3	advmod	_	_
2	bad	bad	ADJ	JJ	Degree=Pos	3	amod	_	_
3	swimmers	swimmer	NOUN	NNS	Number=Plur	5	nsubj	_	_
4	ever	ever	ADV	RB	PronType=Ind	5	advmod	_	_
5	fall	fall	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	into	into	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	water	water	NOUN	NN	Number=Sing	5	obl	_	_
9	from	from	ADP	IN	_	10	case	_	_
10	boats	boat	NOUN	NNS	Number=Plur	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fall** | present | bad swimmers |  |  | the water | ever | from boats | vn escape-51.1-1 «NP V PP.initial\_location PP.destination»: agent=Theme into water=Initial\_Location from boat=Destination |

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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: [Safe at lakes and beaches, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/232-lakes-and-beaches/t7/)
- next →: [Safe at lakes and beaches, test 9](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/232-lakes-and-beaches/t9/)
- ↑ back to [Safe at lakes and beaches](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/232-lakes-and-beaches/)