---
title: Wheels on smooth iron rails have much less friction than wheels on a… — Transport: from horses to planes · tree and pragmatics
description: Wheels on smooth iron rails have much less friction than wheels on a rough road. Who acts: Wheels. A sentence of the lesson «Transport: from horses to planes» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/world/99-transport-horses-to-planes/19/)

<!-- crumbs -->
[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/) / [World](https://md.mova.elamur.ai/free/en/corpora/school/world/) / [Transport: from horses to planes](https://md.mova.elamur.ai/free/en/corpora/school/world/99-transport-horses-to-planes/) / 19

# Transport: from horses to planes, sentence 19

<!-- .ven lang=en -->
Wheels on smooth iron rails have much less friction than wheels on a rough road.

<!-- .vintro -->
**Who acts:** Wheels · **What happens:** have · **To what, where:** less friction

<!-- .vabout -->
This is a sentence of the lesson «Transport: from horses to planes» of the world 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 (Wheels), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:099-transport-horses-to-planes.lesson:19
# text = Wheels on smooth iron rails have much less friction than wheels on a rough road.
# source = school lesson (ours)
# course = world
# lesson = 099-transport-horses-to-planes.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): R7-rel-agree ×1
1	Wheels	wheel	NOUN	NNS	Number=Plur	6	nsubj	_	_
2	on	on	ADP	IN	_	5	case	_	_
3	smooth	smooth	ADJ	JJ	Degree=Pos	5	amod	_	_
4	iron	iron	NOUN	NN	Number=Sing	5	compound	_	Agree=R7-rel-agree|Haiku=5:amod|HaikuPos=ADJ:JJ:Degree=Pos
5	rails	rail	NOUN	NNS	Number=Plur	1	nmod	_	_
6	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	much	much	ADV	RB	_	8	advmod	_	_
8	less	less	ADJ	JJR	Degree=Cmp	9	amod	_	_
9	friction	friction	NOUN	NN	Number=Sing	6	obj	_	_
10	than	than	ADP	IN	_	11	case	_	_
11	wheels	wheel	NOUN	NNS	Number=Plur	9	nmod	_	_
12	on	on	ADP	IN	_	15	case	_	_
13	a	a	DET	DT	Definite=Ind|PronType=Art	15	det	_	_
14	rough	rough	ADJ	JJ	Degree=Pos	15	amod	_	_
15	road	road	NOUN	NN	Number=Sing	11	nmod	_	_
16	.	.	PUNCT	.	_	6	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Wheels on smooth iron rails | less friction |  |  |  | than wheels on a rough road | vn birth-28.2-1 «NP V NP»: agent=Agent friction=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.

<!-- div src -->

**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:world:099-transport-horses-to-planes.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): R7-rel-agree ×1. **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/).

<!-- /div -->

<!-- pn -->
- ← previous: [Transport: from horses to planes, 17](https://md.mova.elamur.ai/free/en/corpora/school/world/99-transport-horses-to-planes/17/)
- next →: [Transport: from horses to planes, 20](https://md.mova.elamur.ai/free/en/corpora/school/world/99-transport-horses-to-planes/20/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/world/99-transport-horses-to-planes/)