---
title: Let go of a ball swung on a string and it flies off in a straight li… — The Moon, the planets and the pull that holds them · tree and pragmatics
description: Let go of a ball swung on a string and it flies off in a straight line, not in a curve. Who acts: you, Moon. A sentence of the lesson «The Moon, the planets and the pull that holds them» of the physics course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# The Moon, the planets and the pull that holds them, sentence 7

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Let go of a ball swung on a string and it flies off in a straight line, not in a curve.

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**Who acts:** you, Moon · **What happens:** let, go, swing, fly off · **To what, where:** ball, string, straight line

<!-- .vabout -->
This is a sentence of the lesson «The Moon, the planets and the pull that holds them» 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, Moon), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:002-the-moon-the-planets-and-the-pull.lesson:7
# text = Let go of a ball swung on a string and it flies off in a straight line, not in a curve.
# source = school lesson (ours)
# course = physics
# lesson = 002-the-moon-the-planets-and-the-pull.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	Let	let	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	go	go	VERB	VB	Mood=Imp|VerbForm=Fin	1	xcomp	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	ball	ball	NOUN	NN	Number=Sing	2	obl	_	_
6	swung	swing	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	5	acl	_	_
7	on	on	ADP	IN	_	9	case	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	string	string	NOUN	NN	Number=Sing	6	obl	_	_
10	and	and	CCONJ	CC	_	12	cc	_	_
11	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	12	nsubj	_	_
12	flies	fly	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	conj	_	_
13	off	off	ADP	RP	_	12	compound:prt	_	_
14	in	in	ADP	IN	_	17	case	_	_
15	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
16	straight	straight	ADJ	JJ	Degree=Pos	17	amod	_	_
17	line	line	NOUN	NN	Number=Sing	12	obl	_	_
18	,	,	PUNCT	,	_	22	punct	_	_
19	not	not	PART	RB	Polarity=Neg	22	advmod	_	_
20	in	in	ADP	IN	_	22	case	_	_
21	a	a	DET	DT	Definite=Ind|PronType=Art	22	det	_	_
22	curve	curve	NOUN	NN	Number=Sing	17	conj	_	_
23	.	.	PUNCT	.	_	1	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: command
- act: request
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **let** | imperative | you *not said here* |  |  |  |  |  | tree rules |
| 2 | **go** | infinitive | you *not said here* |  |  |  |  | of a ball | vn escape-51.1-1 «NP V PP.initial\_location»: agent=Theme of ball=Initial\_Location |
| 3 | **swing** | participle |  | a ball *not said here* |  | a string |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme on string=Trajectory |
| 4 | **fly off** | present | Moon |  |  | a straight line and a curve |  |  | vn spatial\_configuration-47.6-1 «NP V PP.location»: agent=Theme in line=Location |

<!-- .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:002-the-moon-the-planets-and-the-pull.lesson:7`.

**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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