---
title: Iron in dry air, or in water with no air in it, hardly rusts; it nee… — Rust: iron's slow fire · tree and pragmatics
description: Iron in dry air, or in water with no air in it, hardly rusts; it needs both oxygen and water. Who acts: Iron, change. A sentence of the lesson «Rust: iron's slow fire» of the chemistry course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Rust: iron's slow fire, sentence 10

<!-- .ven lang=en -->
Iron in dry air, or in water with no air in it, hardly rusts; it needs both oxygen and water.

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**Who acts:** Iron, change · **What happens:** rust, need · **To what, where:** oxygen

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This is a sentence of the lesson «Rust: iron's slow fire» of the chemistry 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 (Iron, change), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:013-rust-irons-slow-fire.lesson:10
# text = Iron in dry air, or in water with no air in it, hardly rusts; it needs both oxygen and water.
# source = school lesson (ours)
# course = chemistry
# lesson = 013-rust-irons-slow-fire.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	Iron	Iron	PROPN	NNP	Number=Sing	16	nsubj	_	_
2	in	in	ADP	IN	_	4	case	_	_
3	dry	dry	ADJ	JJ	Degree=Pos	4	amod	_	_
4	air	air	NOUN	NN	Number=Sing	1	nmod	_	_
5	,	,	PUNCT	,	_	8	punct	_	_
6	or	or	CCONJ	CC	_	8	cc	_	_
7	in	in	ADP	IN	_	8	case	_	_
8	water	water	NOUN	NN	Number=Sing	4	conj	_	_
9	with	with	ADP	IN	_	11	case	_	_
10	no	no	DET	DT	PronType=Neg	11	det	_	_
11	air	air	NOUN	NN	Number=Sing	8	nmod	_	_
12	in	in	ADP	IN	_	13	case	_	_
13	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	nmod	_	_
14	,	,	PUNCT	,	_	16	punct	_	_
15	hardly	hardly	ADV	RB	_	16	advmod	_	_
16	rusts	rust	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	19	parataxis	_	_
17	;	;	PUNCT	:	_	19	punct	_	_
18	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	19	nsubj	_	_
19	needs	need	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
20	both	both	CCONJ	CC	_	21	cc:preconj	_	_
21	oxygen	oxygen	NOUN	NN	Number=Sing	19	obj	_	_
22	and	and	CCONJ	CC	_	23	cc	_	_
23	water	water	NOUN	NN	Number=Sing	21	conj	_	_
24	.	.	PUNCT	.	_	19	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 | **rust** | present | Iron in dry air or water with no air in change |  |  |  |  | hardly *property* | vn entity\_specific\_cos-45.5 «NP.patient V»: agent=Patient |
| 2 | **need** | present | change | oxygen and water |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot oxygen=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:chemistry:013-rust-irons-slow-fire.lesson:10`.

**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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