---
title: Frogs and many reptiles become very slow and still in winter because… — Migration and hibernation · tree and pragmatics
description: Frogs and many reptiles become very slow and still in winter because they cannot keep themselves warm. Who acts: Frogs. A sentence of the lesson «Migration and hibernation» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Migration and hibernation, sentence 15

<!-- .ven lang=en -->
Frogs and many reptiles become very slow and still in winter because they cannot keep themselves warm.

<!-- .vintro -->
**Who acts:** Frogs · **What happens:** become, not keep · **To what, where:** Frogs

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This is a sentence of the lesson «Migration and hibernation» 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 (Frogs), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:028-migration-and-hibernation.lesson:15
# text = Frogs and many reptiles become very slow and still in winter because they cannot keep themselves warm.
# source = school lesson (ours)
# course = world
# lesson = 028-migration-and-hibernation.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	Frogs	frog	NOUN	NNS	Number=Plur	5	nsubj	_	_
2	and	and	CCONJ	CC	_	4	cc	_	_
3	many	many	ADJ	JJ	Degree=Pos	4	amod	_	_
4	reptiles	reptile	NOUN	NNS	Number=Plur	1	conj	_	_
5	become	become	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	very	very	ADV	RB	_	7	advmod	_	_
7	slow	slow	ADJ	JJ	Degree=Pos	5	xcomp	_	_
8	and	and	CCONJ	CC	_	11	cc	_	_
9	still	still	ADV	RB	_	11	advmod	_	_
10	in	in	ADP	IN	_	11	case	_	_
11	winter	winter	NOUN	NN	Number=Sing	7	conj	_	_
12	because	because	SCONJ	IN	_	16	mark	_	_
13	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	16	nsubj	_	_
14	can	can	AUX	MD	VerbForm=Fin	16	aux	_	_
15	not	not	PART	RB	Polarity=Neg	16	advmod	_	_
16	keep	keep	VERB	VB	VerbForm=Inf	5	advcl	_	_
17	themselves	themselves	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs|Reflex=Yes	16	obj	_	_
18	warm	warm	ADJ	JJ	Degree=Pos	16	xcomp	_	_
19	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- 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 | **become** | present | Frogs and many reptiles |  |  |  |  | slow *property* | vn become-109.1-1-1 «NP V PP.attribute»: agent=Patient |
| 2 | **not** **keep** | can | Frogs *= frog* | Frogs *= frog* |  |  |  | warm *property* | vn keep-15.2 «NP V NP»: agent=Agent themselves=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:world:028-migration-and-hibernation.lesson:15`.

**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: [Migration and hibernation, 14](https://md.mova.elamur.ai/free/en/corpora/school/world/28-migration-and-hibernation/14/)
- next →: [Migration and hibernation, 16](https://md.mova.elamur.ai/free/en/corpora/school/world/28-migration-and-hibernation/16/)
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