---
title: A hermit crab has ten legs, but the back ones are small and hidden i… — Unusual pets: stick insects, giant snails, ant f… · tree and pragmatics
description: A hermit crab has ten legs, but the back ones are small and hidden inside the shell to hold on, so only six are easy to see. Who acts: hermit crab, back ones, six. A sentence of the lesson «Unusual pets: stick insects, giant snails, ant farms and hermit crabs» of the biology course of Mova's primary
---

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# Unusual pets: stick insects, giant snails, ant farms and hermit crabs, sentence 18

<!-- .ven lang=en -->
A hermit crab has ten legs, but the back ones are small and hidden inside the shell to hold on, so only six are easy to see.

<!-- .vintro -->
**Who acts:** hermit crab, back ones, six · **What happens:** have, be, hide, hold on, see · **To what, where:** ten legs, shell

<!-- .vabout -->
This is a sentence of the lesson «Unusual pets: stick insects, giant snails, ant farms and hermit crabs» 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 (hermit crab, back ones, six), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:330-unusual-pets-stick-insects-giant-snails-ant-farms-and-hermit-crabs.lesson:18
# text = A hermit crab has ten legs, but the back ones are small and hidden inside the shell to hold on, so only six are easy to see.
# source = school lesson (ours)
# course = biology
# lesson = 330-unusual-pets-stick-insects-giant-snails-ant-farms-and-hermit-crabs.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): R5-strong ×1, R7-rel-agree ×1, R8-pos-agree ×2
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	hermit	hermit	NOUN	NN	Number=Sing	3	compound	_	_
3	crab	crab	NOUN	NN	Number=Sing	4	nsubj	_	_
4	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	ten	ten	NUM	CD	NumForm=Word|NumType=Card	6	nummod	_	_
6	legs	leg	NOUN	NNS	Number=Plur	4	obj	_	_
7	,	,	PUNCT	,	_	13	punct	_	_
8	but	but	CCONJ	CC	_	13	cc	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	back	back	NOUN	NN	Number=Sing	11	compound	_	_
11	ones	one	NOUN	NNS	Number=Plur	13	nsubj	_	_
12	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	13	cop	_	_
13	small	small	ADJ	JJ	Degree=Pos	4	conj	_	Agree=R7-rel-agree|Haiku=4:parataxis
14	and	and	CCONJ	CC	_	15	cc	_	_
15	hidden	hide	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	13	conj	_	Agree=R8-pos-agree|Haiku=13:conj|HaikuPos=ADJ:JJ:Degree=Pos
16	inside	inside	ADP	IN	_	18	case	_	_
17	the	the	DET	DT	Definite=Def|PronType=Art	18	det	_	_
18	shell	shell	NOUN	NN	Number=Sing	15	obl	_	_
19	to	to	PART	TO	_	20	mark	_	_
20	hold	hold	VERB	VB	VerbForm=Inf	15	advcl	_	Agree=R5-strong|Haiku=18:acl
21	on	on	ADP	RP	_	20	compound:prt	_	Agree=R8-pos-agree|Haiku=20:compound:prt|HaikuPos=PART:RP:_
22	,	,	PUNCT	,	_	27	punct	_	_
23	so	so	ADV	RB	_	27	advmod	_	_
24	only	only	ADV	RB	_	25	advmod	_	_
25	six	six	NUM	CD	NumForm=Word|NumType=Card	27	nsubj	_	_
26	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	27	cop	_	_
27	easy	easy	ADJ	JJ	Degree=Pos	13	conj	_	_
28	to	to	PART	TO	_	29	mark	_	_
29	see	see	VERB	VB	VerbForm=Inf	27	xcomp	_	_
30	.	.	PUNCT	.	_	4	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 | a hermit crab | ten legs |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent leg=Patient |
| 2 | **is** | present | the back ones |  |  |  |  | small *property* | tree rules |
| 3 | **hide** | participle | the back ones *not said here* |  |  | the shell |  |  | vn concealment-16-1 «NP V PP.location»: agent=Agent inside shell=Location |
| 4 | **hold on** | to-infinitive | the back ones *not said here* |  |  |  |  |  | vn exist-47.1 «NP V»: agent=Theme |
| 5 | **is** | present | six |  |  |  |  | easy *property* | tree rules |
| 6 | **see** | to-infinitive | six *not said here* |  |  |  |  |  | vn comprehend-87.2-1-1 «NP V»: agent=Experiencer |

<!-- .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:biology:330-unusual-pets-stick-insects-giant-snails-ant-farms-and-hermit-crabs.lesson:18`.

**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): R5-strong ×1, R7-rel-agree ×1, R8-pos-agree ×2. **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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