---
title: Bones cannot move on their own; muscles pull on them, always pulling… — Cells, bones and muscles · tree and pragmatics
description: Bones cannot move on their own; muscles pull on them, always pulling and never pushing, so they work in pairs, one to bend a joint and one to straighten it. Who acts: Bones, muscles, one. A sentence of the lesson «Cells, bones and muscles» of the biology course of Mova's primary school with its depe
---

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# Cells, bones and muscles, sentence 3

<!-- .ven lang=en -->
Bones cannot move on their own; muscles pull on them, always pulling and never pushing, so they work in pairs, one to bend a joint and one to straighten it.

<!-- .vintro -->
**Who acts:** Bones, muscles, one · **What happens:** not move, pull, not push, work, bend, straighten · **To what, where:** own, joint

<!-- .vabout -->
This is a sentence of the lesson «Cells, bones and muscles» 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 (Bones, muscles, one), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:064-cells-bones-and-muscles.lesson:3
# text = Bones cannot move on their own; muscles pull on them, always pulling and never pushing, so they work in pairs, one to bend a joint and one to straighten it.
# source = school lesson (ours)
# course = biology
# lesson = 064-cells-bones-and-muscles.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): R7-rel-agree ×1
1	Bones	bone	NOUN	NNS	Number=Plur	4	nsubj	_	_
2	can	can	AUX	MD	VerbForm=Fin	4	aux	_	_
3	not	not	PART	RB	Polarity=Neg	4	advmod	_	_
4	move	move	VERB	VB	VerbForm=Inf	0	root	_	_
5	on	on	ADP	IN	_	7	case	_	_
6	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	7	nmod:poss	_	_
7	own	own	ADJ	JJ	Degree=Pos	4	obl	_	_
8	;	;	PUNCT	:	_	10	punct	_	_
9	muscles	muscle	NOUN	NNS	Number=Plur	10	nsubj	_	_
10	pull	pull	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	parataxis	_	Agree=R7-rel-agree|Haiku=4:advcl
11	on	on	ADP	IN	_	12	case	_	_
12	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	10	obl	_	_
13	,	,	PUNCT	,	_	15	punct	_	_
14	always	always	ADV	RB	PronType=Tot	15	advmod	_	_
15	pulling	pull	VERB	VBG	Tense=Pres|VerbForm=Part	10	advcl	_	_
16	and	and	CCONJ	CC	_	18	cc	_	_
17	never	never	ADV	RB	PronType=Neg	18	advmod	_	_
18	pushing	push	VERB	VBG	Tense=Pres|VerbForm=Part	15	conj	_	_
19	,	,	PUNCT	,	_	22	punct	_	_
20	so	so	ADV	RB	_	22	advmod	_	_
21	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	22	nsubj	_	_
22	work	work	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	parataxis	_	_
23	in	in	ADP	IN	_	24	case	_	_
24	pairs	pair	NOUN	NNS	Number=Plur	22	obl	_	_
25	,	,	PUNCT	,	_	28	punct	_	_
26	one	one	PRON	PRP	Number=Sing|Person=3|PronType=Prs	28	nsubj	_	_
27	to	to	PART	TO	_	28	mark	_	_
28	bend	bend	VERB	VB	VerbForm=Inf	4	conj	_	_
29	a	a	DET	DT	Definite=Ind|PronType=Art	30	det	_	_
30	joint	joint	NOUN	NN	Number=Sing	28	obj	_	_
31	and	and	CCONJ	CC	_	34	cc	_	_
32	one	one	PRON	PRP	Number=Sing|Person=3|PronType=Prs	34	nsubj	_	_
33	to	to	PART	TO	_	34	mark	_	_
34	straighten	straighten	VERB	VB	VerbForm=Inf	4	conj	_	_
35	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	34	obj	_	_
36	.	.	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 | **not** **move** | can | Bones |  |  | bones's own |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme on own=Trajectory |
| 2 | **pull** | present | muscles |  |  |  |  | on bones *= bone* | vn push-12-1 «NP V PP-Conative»: agent=Agent on they=Theme |
| 3 | **pull** | gerund | muscles *not said here* |  |  |  |  | always *property* | vn slide-11.2 «NP V»: agent=Theme |
| 4 | **not** **push** | gerund | muscles *not said here* |  |  |  |  |  | vn push-12-1-1 «NP V PP»: agent=Agent |
| 5 | **work** | present | bones *= bone* |  |  |  |  | in pairs | vn employment-95.3 «NP V PP.theme»: agent=Agent in pair=Theme |
| 6 | **bend** | to-infinitive | one | a joint |  |  |  |  | vn knead-26.5 «NP V NP.material»: agent=Agent joint=Material |
| 7 | **straighten** | to-infinitive | one | joint |  |  |  |  | vn bend-45.2 «NP V NP.patient»: agent=Agent it=Patient |

<!-- .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:064-cells-bones-and-muscles.lesson:3`.

**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): R7-rel-agree ×1. **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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