---
title: You must never go under a car held up only by a jack, because it can… — Pulleys, gears and big machines · tree and pragmatics
description: You must never go under a car held up only by a jack, because it can slip. Who acts: You, jack. A sentence of the lesson «Pulleys, gears and big machines» of the physics course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Pulleys, gears and big machines, sentence 15

<!-- .ven lang=en -->
You must never go under a car held up only by a jack, because it can slip.

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**Who acts:** You, jack · **What happens:** not go, hold up, slip · **To what, where:** car

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This is a sentence of the lesson «Pulleys, gears and big machines» 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 (You, jack), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:035-pulleys-gears-and-big-machines.lesson:15
# text = You must never go under a car held up only by a jack, because it can slip.
# source = school lesson (ours)
# course = physics
# lesson = 035-pulleys-gears-and-big-machines.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	You	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	4	nsubj	_	_
2	must	must	AUX	MD	VerbForm=Fin	4	aux	_	_
3	never	never	ADV	RB	PronType=Neg	4	advmod	_	_
4	go	go	VERB	VB	VerbForm=Inf	0	root	_	_
5	under	under	ADP	IN	_	7	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	car	car	NOUN	NN	Number=Sing	4	obl	_	_
8	held	hold	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	acl	_	_
9	up	up	ADP	RP	_	8	compound:prt	_	_
10	only	only	ADV	RB	_	8	advmod	_	_
11	by	by	ADP	IN	_	13	case	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
13	jack	jack	NOUN	NN	Number=Sing	8	obl	_	_
14	,	,	PUNCT	,	_	18	punct	_	_
15	because	because	SCONJ	IN	_	18	mark	_	_
16	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	18	nsubj	_	_
17	can	can	AUX	MD	VerbForm=Fin	18	aux	_	_
18	slip	slip	VERB	VB	VerbForm=Inf	4	advcl	_	_
19	.	.	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** **go** | must | You |  |  | a car |  |  | vn occur-48.3-2 «NP V PP»: agent=Theme under car=Location |
| 2 | **hold up** | participle |  | a car *not said here* |  |  |  | by a jack | vn support-15.3-1 «NP V NP»: agent=Pivot |
| 3 | **slip** | can | jack |  |  |  |  |  | vn calibratable\_cos-45.6.1-1 «NP.attribute V»: agent=Attribute |

<!-- .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:035-pulleys-gears-and-big-machines.lesson:15`.

**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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- ← previous: [Pulleys, gears and big machines, 14](https://md.mova.elamur.ai/free/en/corpora/school/physics/35-pulleys-gears-and-big-machines/14/)
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- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/physics/35-pulleys-gears-and-big-machines/)