---
title: A helmet that fits well can more than halve the chance of a serious… — Riding a bike or a scooter safely · tree and pragmatics
description: A helmet that fits well can more than halve the chance of a serious head injury in a bike crash. Who acts: helmet, serious head injury. A sentence of the lesson «Riding a bike or a scooter safely» of the everyday course of Mova's primary school with its dependency tree and the pragmatics of every cl
---

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# Riding a bike or a scooter safely, sentence 19

<!-- .ven lang=en -->
A helmet that fits well can more than halve the chance of a serious head injury in a bike crash.

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**Who acts:** helmet, serious head injury · **What happens:** fit, halve, chance · **To what, where:** chance

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This is a sentence of the lesson «Riding a bike or a scooter safely» of the everyday 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 (helmet, serious head injury), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:everyday:005-bikes-and-scooters.lesson:19
# text = A helmet that fits well can more than halve the chance of a serious head injury in a bike crash.
# source = school lesson (ours)
# course = everyday
# lesson = 005-bikes-and-scooters.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	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	helmet	helmet	NOUN	NN	Number=Sing	9	nsubj	_	_
3	that	that	PRON	WDT	PronType=Rel	4	nsubj	_	_
4	fits	fit	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	acl:relcl	_	_
5	well	well	ADV	RB	Degree=Pos	4	advmod	_	_
6	can	can	AUX	MD	VerbForm=Fin	9	aux	_	_
7	more	more	ADV	RBR	Degree=Cmp	9	advmod	_	_
8	than	than	ADP	IN	_	7	fixed	_	_
9	halve	halve	VERB	VB	VerbForm=Inf	0	root	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	chance	chance	NOUN	NN	Number=Sing	9	obj	_	_
12	of	of	ADP	IN	_	16	case	_	_
13	a	a	DET	DT	Definite=Ind|PronType=Art	16	det	_	_
14	serious	serious	ADJ	JJ	Degree=Pos	16	amod	_	_
15	head	head	NOUN	NN	Number=Sing	16	compound	_	_
16	injury	injury	NOUN	NN	Number=Sing	11	nmod	_	_
17	in	in	ADP	IN	_	20	case	_	_
18	a	a	DET	DT	Definite=Ind|PronType=Art	20	det	_	_
19	bike	bike	NOUN	NN	Number=Sing	20	compound	_	_
20	crash	crash	NOUN	NN	Number=Sing	16	nmod	_	_
21	.	.	PUNCT	.	_	9	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fit** | present | a helmet |  |  |  |  | well *property* | vn adjust-26.9 «NP V S\_ING»: agent=Agent |
| 2 | **halve** | can | a helmet | the chance of a serious head injury in a bike crash |  |  |  |  | vn remedy-45.7-1 «NP V NP.patient»: agent=Agent chance=Patient |
| 3 | **chance** |  | a serious head injury in a bike crash |  |  |  |  |  | nom chance «state intransitive»: of=agent |

<!-- .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.

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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:everyday:005-bikes-and-scooters.lesson:19`.

**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: [Riding a bike or a scooter safely, 18](https://md.mova.elamur.ai/free/en/corpora/school/everyday/5-bikes-and-scooters/18/)
- next →: [Riding a bike or a scooter safely, 20](https://md.mova.elamur.ai/free/en/corpora/school/everyday/5-bikes-and-scooters/20/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/everyday/5-bikes-and-scooters/)