---
title: Snakes have no eyelids; a clear scale covers each eye. — The reptile house: snakes · tree and pragmatics
description: Snakes have no eyelids; a clear scale covers each eye. Who acts: Snakes, clear scale. A sentence of the lesson «The reptile house: snakes» of the biology course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# The reptile house: snakes, sentence 11

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Snakes have no eyelids; a clear scale covers each eye.

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**Who acts:** Snakes, clear scale · **What happens:** have, cover · **To what, where:** eyelids, eye

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This is a sentence of the lesson «The reptile house: snakes» of the biology 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 (Snakes, clear scale), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:087-reptile-house-snakes.lesson:11
# text = Snakes have no eyelids; a clear scale covers each eye.
# source = school lesson (ours)
# course = biology
# lesson = 087-reptile-house-snakes.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	Snakes	snake	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	no	no	DET	DT	PronType=Neg	4	det	_	_
4	eyelids	eyelid	NOUN	NNS	Number=Plur	2	obj	_	_
5	;	;	PUNCT	,	_	2	punct	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	clear	clear	ADJ	JJ	Degree=Pos	8	amod	_	_
8	scale	scale	NOUN	NN	Number=Sing	9	nsubj	_	_
9	covers	cover	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	parataxis	_	_
10	each	each	DET	DT	PronType=Tot	11	det	_	_
11	eye	eye	NOUN	NN	Number=Sing	9	obj	_	_
12	.	.	PUNCT	.	_	2	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 | Snakes | no eyelids |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent eyelid=Patient |
| 2 | **cover** | present | a clear scale | each eye |  |  |  |  | vn fill-9.8-1 «NP V NP»: agent=Theme eye=Destination |

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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:biology:087-reptile-house-snakes.lesson:11`.

**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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