---
title: Fish are slippery because their skin is covered in slime, which also… — Living with friction: oil, wheels and grip · tree and pragmatics
description: Fish are slippery because their skin is covered in slime, which also protects them from germs, so wet your hands before holding one. Who acts: Fish, slime. A sentence of the lesson «Living with friction: oil, wheels and grip» of the physics course of Mova's primary school with its dependency tree an
---

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# Living with friction: oil, wheels and grip, sentence 14

<!-- .ven lang=en -->
Fish are slippery because their skin is covered in slime, which also protects them from germs, so wet your hands before holding one.

<!-- .vintro -->
**Who acts:** Fish, slime · **What happens:** be, cover, protect, hold · **To what, where:** skin, Fish, hands, one

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This is a sentence of the lesson «Living with friction: oil, wheels and grip» 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 (Fish, slime), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:007-living-with-friction.lesson:14
# text = Fish are slippery because their skin is covered in slime, which also protects them from germs, so wet your hands before holding one.
# source = school lesson (ours)
# course = physics
# lesson = 007-living-with-friction.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	Fish	fish	NOUN	NNS	Number=Plur	3	nsubj	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	slippery	slippery	ADJ	JJ	Degree=Pos	0	root	_	_
4	because	because	SCONJ	IN	_	8	mark	_	_
5	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	6	nmod:poss	_	_
6	skin	skin	NOUN	NN	Number=Sing	8	nsubj:pass	_	_
7	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	aux:pass	_	_
8	covered	cover	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	advcl	_	_
9	in	in	ADP	IN	_	10	case	_	_
10	slime	slime	NOUN	NN	Number=Sing	8	obl	_	_
11	,	,	PUNCT	,	_	14	punct	_	_
12	which	which	PRON	WDT	PronType=Rel	14	nsubj	_	_
13	also	also	ADV	RB	_	14	advmod	_	_
14	protects	protect	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	acl:relcl	_	_
15	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	14	obj	_	_
16	from	from	ADP	IN	_	17	case	_	_
17	germs	germ	NOUN	NNS	Number=Plur	14	obl	_	_
18	,	,	PUNCT	,	_	20	punct	_	_
19	so	so	ADV	RB	_	20	advmod	_	_
20	wet	wet	ADJ	JJ	Degree=Pos	3	conj	_	_
21	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	22	nmod:poss	_	_
22	hands	hand	NOUN	NNS	Number=Plur	20	obj	_	_
23	before	before	SCONJ	IN	_	24	mark	_	_
24	holding	hold	VERB	VBG	Tense=Pres|VerbForm=Part	20	advcl	_	_
25	one	one	NUM	CD	NumForm=Word|NumType=Card	24	obj	_	_
26	.	.	PUNCT	.	_	3	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 | **is** | present | Fish |  |  |  |  | slippery *property* | tree rules |
| 2 | **cover** | present · passive |  | Fish's skin |  |  |  | in slime | vn fill-9.8-1 «NP V NP PP.theme»: subject=Destination in slime=Theme |
| 3 | **protect** | present | slime | Fish |  |  |  | from germs | vn defend-72.3 «NP V NP PP.theme»: agent=Agent they=Beneficiary from germ=Theme |
| 4 | **be** |  | Fish *not said here* | your hands |  |  |  |  | tree rules |
| 5 | **hold** | gerund | Fish *not said here* | one |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent one=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.

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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:007-living-with-friction.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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