---
title: A vacuum cleaner does not really suck: its fan throws air out of the… — Pressure tricks: pumps, tyres and vacuums · tree and pragmatics
description: A vacuum cleaner does not really suck: its fan throws air out of the back, the pressure inside drops, and the outside air rushes in at the nozzle, carrying the crumbs with it. Who acts: vacuum cleaner, fan, pressure, outside air. A sentence of the lesson «Pressure tricks: pumps, tyres and vacuums» o
---

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# Pressure tricks: pumps, tyres and vacuums, sentence 1

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A vacuum cleaner does not really suck: its fan throws air out of the back, the pressure inside drops, and the outside air rushes in at the nozzle, carrying the crumbs with it.

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**Who acts:** vacuum cleaner, fan, pressure, outside air · **What happens:** not suck, throw, drop, rush in, carry · **To what, where:** air, back, nozzle, crumbs

<!-- .vabout -->
This is a sentence of the lesson «Pressure tricks: pumps, tyres and vacuums» 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 (vacuum cleaner, fan, pressure, outside air), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:016-pressure-tricks-pumps-tyres-vacuums.lesson:1
# text = A vacuum cleaner does not really suck: its fan throws air out of the back, the pressure inside drops, and the outside air rushes in at the nozzle, carrying the crumbs with it.
# source = school lesson (ours)
# course = physics
# lesson = 016-pressure-tricks-pumps-tyres-vacuums.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): R3-conj-first ×1, R5-strong ×2
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	vacuum	vacuum	NOUN	NN	Number=Sing	3	compound	_	_
3	cleaner	cleaner	NOUN	NN	Number=Sing	7	nsubj	_	_
4	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux	_	_
5	not	not	PART	RB	Polarity=Neg	7	advmod	_	_
6	really	really	ADV	RB	_	7	advmod	_	_
7	suck	suck	VERB	VB	VerbForm=Inf	0	root	_	_
8	:	:	PUNCT	:	_	12	punct	_	_
9	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	10	nmod:poss	_	_
10	fan	fan	NOUN	NN	Number=Sing	11	nsubj	_	_
11	throws	throw	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	parataxis	_	_
12	air	air	NOUN	NN	Number=Sing	11	obj	_	_
13	out	out	ADP	IN	_	16	case	_	_
14	of	of	ADP	IN	_	16	case	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
16	back	back	NOUN	NN	Number=Sing	12	nmod	_	_
17	,	,	PUNCT	,	_	19	punct	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
19	pressure	pressure	NOUN	NN	Number=Sing	21	nsubj	_	_
20	inside	inside	ADP	IN	_	21	case	_	_
21	drops	drop	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	conj	_	_
22	,	,	PUNCT	,	_	27	punct	_	_
23	and	and	CCONJ	CC	_	27	cc	_	_
24	the	the	DET	DT	Definite=Def|PronType=Art	26	det	_	_
25	outside	outside	ADJ	JJ	Degree=Pos	26	amod	_	_
26	air	air	NOUN	NN	Number=Sing	27	nsubj	_	_
27	rushes	rush	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	conj	_	Agree=R3-conj-first|Haiku=21:conj
28	in	in	ADV	RB	_	27	advmod	_	Agree=R5-strong|Haiku=31:case|HaikuPos=ADP:IN:_
29	at	at	ADP	IN	_	31	case	_	_
30	the	the	DET	DT	Definite=Def|PronType=Art	31	det	_	_
31	nozzle	nozzle	NOUN	NN	Number=Sing	27	obl	_	_
32	,	,	PUNCT	,	_	33	punct	_	_
33	carrying	carry	VERB	VBG	Tense=Pres|VerbForm=Part	27	advcl	_	Agree=R5-strong|Haiku=7:advcl
34	the	the	DET	DT	Definite=Def|PronType=Art	35	det	_	_
35	crumbs	crumb	NOUN	NNS	Number=Plur	33	obj	_	_
36	with	with	ADP	IN	_	37	case	_	_
37	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	33	obl	_	_
38	.	.	PUNCT	.	_	7	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** **suck** | present · do-support | a vacuum cleaner |  |  |  |  |  | vn chew-39.2 «NP V»: agent=Agent |
| 2 | **throw** | present | cleaner's fan | air |  | the back |  |  | vn throw-17.1-1-1 «NP V NP PP.destinations»: agent=Agent air=Theme out back=Destination |
| 3 | **drop** | present | the pressure |  |  |  |  |  | vn roll-51.3.1 «NP.theme V»: agent=Theme |
| 4 | **rush in** | present | the outside air |  |  | the nozzle |  |  | vn run-51.3.2-2-1 «NP V PP.location»: agent=Theme at nozzle=Trajectory |
| 5 | **carry** | gerund | the outside air *not said here* | the crumbs |  |  |  | with Air | vn carry-11.4 «NP V NP»: agent=Agent crumb=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:physics:016-pressure-tricks-pumps-tyres-vacuums.lesson:1`.

**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): R3-conj-first ×1, R5-strong ×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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