---
title: Keeping your seat belt fastened whenever you are seated protects you… — Why planes fly · tree and pragmatics
description: Keeping your seat belt fastened whenever you are seated protects you if the plane hits sudden bumps. Who acts: seat belt, Keeping, plane. A sentence of the lesson «Why planes fly» of the technology course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Why planes fly, sentence 13

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Keeping your seat belt fastened whenever you are seated protects you if the plane hits sudden bumps.

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**Who acts:** seat belt, Keeping, plane · **What happens:** keep, fasten, seat, protect, hit · **To what, where:** seat belt, you, sudden bumps

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This is a sentence of the lesson «Why planes fly» of the technology 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 (seat belt, Keeping, plane), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:technology:022-why-planes-fly.lesson:13
# text = Keeping your seat belt fastened whenever you are seated protects you if the plane hits sudden bumps.
# source = school lesson (ours)
# course = technology
# lesson = 022-why-planes-fly.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	Keeping	keep	VERB	VBG	Tense=Pres|VerbForm=Part	10	csubj	_	_
2	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	4	nmod:poss	_	_
3	seat	seat	NOUN	NN	Number=Sing	4	compound	_	_
4	belt	belt	NOUN	NN	Number=Sing	1	obj	_	_
5	fastened	fasten	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	1	xcomp	_	_
6	whenever	whenever	ADV	WRB	PronType=Rel	5	advmod	_	_
7	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	9	nsubj	_	_
8	are	be	AUX	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	9	aux:pass	_	_
9	seated	seat	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	6	advcl:relcl	_	_
10	protects	protect	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
11	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	10	obj	_	_
12	if	if	SCONJ	IN	_	15	mark	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	plane	plane	NOUN	NN	Number=Sing	15	nsubj	_	_
15	hits	hit	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	advcl	_	_
16	sudden	sudden	ADJ	JJ	Degree=Pos	17	amod	_	_
17	bumps	bump	NOUN	NNS	Number=Plur	15	obj	_	_
18	.	.	PUNCT	.	_	10	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: changed act=assert

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | gerund |  | your seat belt |  |  |  |  | tree rules |
| 2 | **fasten** | participle | your seat belt *not said here* |  |  |  |  | whenever *property* | vn shake-22.3-2-1 «NP V ADV-Middle»: agent=Patient |
| 3 | **seat** | present · passive |  | you |  |  |  |  | vn fit-54.3 «NP.location V NP»: subject=Value |
| 4 | **protect** | present | Keeping |  | you |  |  |  | vn defend-72.3 «NP V NP»: agent=Agent you=Beneficiary |
| 5 | **hit** *a condition, not said to happen* | present | the plane | sudden bumps |  |  |  |  | vn contiguous\_location-47.8-1 «NP V NP»: agent=Theme bump=Co-Theme |

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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:technology:022-why-planes-fly.lesson:13`.

**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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