---
title: Mountain bikes have wide, knobbly tyres for grip on mud, and road bi… — Riding a bike: why it stays up · tree and pragmatics
description: Mountain bikes have wide, knobbly tyres for grip on mud, and road bikes have thin, smooth ones for speed. Who acts: Mountain bikes, road bikes. A sentence of the lesson «Riding a bike: why it stays up» of the physics course of Mova's primary school with its dependency tree and the pragmatics of ever
---

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[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Physics](https://md.mova.elamur.ai/free/en/corpora/school/physics/) / [Riding a bike: why it stays up](https://md.mova.elamur.ai/free/en/corpora/school/physics/9-riding-a-bike/) / 14

# Riding a bike: why it stays up, sentence 14

<!-- .ven lang=en -->
Mountain bikes have wide, knobbly tyres for grip on mud, and road bikes have thin, smooth ones for speed.

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**Who acts:** Mountain bikes, road bikes · **What happens:** have · **To what, where:** wide knobbly tyres, thin smooth ones

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This is a sentence of the lesson «Riding a bike: why it stays up» of the physics 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 (Mountain bikes, road bikes), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:009-riding-a-bike.lesson:14
# text = Mountain bikes have wide, knobbly tyres for grip on mud, and road bikes have thin, smooth ones for speed.
# source = school lesson (ours)
# course = physics
# lesson = 009-riding-a-bike.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	Mountain	mountain	NOUN	NN	Number=Sing	2	compound	_	_
2	bikes	bike	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	wide	wide	ADJ	JJ	Degree=Pos	7	amod	_	_
5	,	,	PUNCT	,	_	4	punct	_	_
6	knobbly	knobbly	ADJ	JJ	Degree=Pos	7	amod	_	_
7	tyres	tyre	NOUN	NNS	Number=Plur	3	obj	_	_
8	for	for	ADP	IN	_	9	case	_	_
9	grip	grip	NOUN	NN	Number=Sing	7	nmod	_	_
10	on	on	ADP	IN	_	11	case	_	_
11	mud	mud	NOUN	NN	Number=Sing	9	nmod	_	_
12	,	,	PUNCT	,	_	16	punct	_	_
13	and	and	CCONJ	CC	_	16	cc	_	_
14	road	road	NOUN	NN	Number=Sing	15	compound	_	_
15	bikes	bike	NOUN	NNS	Number=Plur	16	nsubj	_	_
16	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
17	thin	thin	ADJ	JJ	Degree=Pos	20	amod	_	_
18	,	,	PUNCT	,	_	17	punct	_	_
19	smooth	smooth	ADJ	JJ	Degree=Pos	20	amod	_	_
20	ones	one	NOUN	NNS	Number=Plur	16	obj	_	_
21	for	for	ADP	IN	_	22	case	_	_
22	speed	speed	NOUN	NN	Number=Sing	20	nmod	_	_
23	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Mountain bikes | wide knobbly tyres |  |  |  | for grip on mud | vn birth-28.2-1 «NP V NP»: agent=Agent tyre=Patient |
| 2 | **have** | present | road bikes | thin smooth ones |  |  |  | for speed | vn birth-28.2-1 «NP V NP»: agent=Agent one=Patient |

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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:physics:009-riding-a-bike.lesson:14`.

**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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