---
title: A battery does not hold a tankful of electricity: it holds chemicals… — Batteries, circuits and how electricity flows · tree and pragmatics
description: A battery does not hold a tankful of electricity: it holds chemicals that push electricity round the loop, and when those chemicals are used up the battery is flat. Who acts: battery, chemicals. A sentence of the lesson «Batteries, circuits and how electricity flows» of the physics course of Mova's 
---

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# Batteries, circuits and how electricity flows, sentence 2

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A battery does not hold a tankful of electricity: it holds chemicals that push electricity round the loop, and when those chemicals are used up the battery is flat.

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**Who acts:** battery, chemicals · **What happens:** not hold, hold, push, use up, be · **To what, where:** tankful, chemicals, electricity, loop

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This is a sentence of the lesson «Batteries, circuits and how electricity flows» of the physics 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 (battery, chemicals), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:027-batteries-circuits-and-how-electricity-flows.lesson:2
# text = A battery does not hold a tankful of electricity: it holds chemicals that push electricity round the loop, and when those chemicals are used up the battery is flat.
# source = school lesson (ours)
# course = physics
# lesson = 027-batteries-circuits-and-how-electricity-flows.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	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	battery	battery	NOUN	NN	Number=Sing	5	nsubj	_	_
3	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux	_	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
5	hold	hold	VERB	VB	VerbForm=Inf	0	root	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	tankful	tankful	NOUN	NN	Number=Sing	5	obj	_	_
8	of	of	ADP	IN	_	9	case	_	_
9	electricity	electricity	NOUN	NN	Number=Sing	7	nmod	_	_
10	:	:	PUNCT	:	_	12	punct	_	_
11	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	12	nsubj	_	_
12	holds	hold	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	parataxis	_	Agree=R7-rel-agree|Haiku=5:conj
13	chemicals	chemical	NOUN	NNS	Number=Plur	12	obj	_	_
14	that	that	PRON	WDT	PronType=Rel	15	nsubj	_	_
15	push	push	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	13	acl:relcl	_	_
16	electricity	electricity	NOUN	NN	Number=Sing	15	obj	_	_
17	round	round	ADP	IN	_	19	case	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
19	loop	loop	NOUN	NN	Number=Sing	15	obl	_	_
20	,	,	PUNCT	,	_	26	punct	_	_
21	and	and	CCONJ	CC	_	26	cc	_	_
22	when	when	ADV	WRB	PronType=Int	26	advmod	_	_
23	those	that	DET	DT	Number=Plur|PronType=Dem	24	det	_	_
24	chemicals	chemical	NOUN	NNS	Number=Plur	26	nsubj:pass	_	_
25	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	26	aux:pass	_	_
26	used	use	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	12	conj	_	_
27	up	up	ADP	RP	_	26	compound:prt	_	_
28	the	the	DET	DT	Definite=Def|PronType=Art	29	det	_	_
29	battery	battery	NOUN	NN	Number=Sing	31	nsubj	_	_
30	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	31	cop	_	_
31	flat	flat	ADJ	JJ	Degree=Pos	26	parataxis	_	_
32	.	.	PUNCT	.	_	5	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 | **not** **hold** | present · do-support | a battery | a tankful of electricity |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent tankful=Theme |
| 2 | **hold** | present | battery | chemicals |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent chemical=Theme |
| 3 | **push** | present | chemicals | electricity |  | the loop |  |  | vn funnel-9.3-1-1 «NP V NP PP.trajectory»: agent=Agent electricity=Theme round loop=Trajectory |
| 4 | **use up** | present · passive |  | that chemicals |  |  |  |  | vn eat-39.1 «NP V NP»: subject=Patient |
| 5 | **is** | present | the battery |  |  |  |  | flat *property* | tree rules |

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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:physics:027-batteries-circuits-and-how-electricity-flows.lesson:2`.

**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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