---
title: Polar bears have a thick layer of fat and dense fur to keep warm. — Habitats and adaptations · tree and pragmatics
description: Polar bears have a thick layer of fat and dense fur to keep warm. Who acts: Polar bears. A sentence of the lesson «Habitats and adaptations» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Habitats and adaptations, sentence 12

<!-- .ven lang=en -->
Polar bears have a thick layer of fat and dense fur to keep warm.

<!-- .vintro -->
**Who acts:** Polar bears · **What happens:** have, keep · **To what, where:** thick layer

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This is a sentence of the lesson «Habitats and adaptations» 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 (Polar bears), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:027-habitats-and-adaptations.lesson:12
# text = Polar bears have a thick layer of fat and dense fur to keep warm.
# source = school lesson (ours)
# course = world
# lesson = 027-habitats-and-adaptations.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	Polar	polar	ADJ	JJ	Degree=Pos	2	amod	_	_
2	bears	bear	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	thick	thick	ADJ	JJ	Degree=Pos	6	amod	_	_
6	layer	layer	NOUN	NN	Number=Sing	3	obj	_	_
7	of	of	ADP	IN	_	8	case	_	_
8	fat	fat	NOUN	NN	Number=Sing	6	nmod	_	_
9	and	and	CCONJ	CC	_	11	cc	_	_
10	dense	dense	ADJ	JJ	Degree=Pos	11	amod	_	_
11	fur	fur	NOUN	NN	Number=Sing	8	conj	_	_
12	to	to	PART	TO	_	13	mark	_	_
13	keep	keep	VERB	VB	VerbForm=Inf	11	acl	_	_
14	warm	warm	ADJ	JJ	Degree=Pos	13	xcomp	_	_
15	.	.	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 | Polar bears | a thick layer of fat and dense fur |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent layer=Patient |
| 2 | **keep** | to-infinitive | Polar bears *not said here* |  |  |  |  | warm *property* | vn keep-15.2 «NP V NP»: agent=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:world:027-habitats-and-adaptations.lesson:12`.

**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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