---
title: A seesaw is a lever with the pivot in the middle, so a child sitting… — Levers: lifting heavy things with a little push · tree and pragmatics
description: A seesaw is a lever with the pivot in the middle, so a child sitting far out can lift a grown-up sitting close in. Who acts: seesaw, child, grown up. A sentence of the lesson «Levers: lifting heavy things with a little push» of the physics course of Mova's primary school with its dependency tree and
---

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# Levers: lifting heavy things with a little push, sentence 7

<!-- .ven lang=en -->
A seesaw is a lever with the pivot in the middle, so a child sitting far out can lift a grown-up sitting close in.

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**Who acts:** seesaw, child, grown up · **What happens:** be, sit, lift · **To what, where:** lever, grown up

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This is a sentence of the lesson «Levers: lifting heavy things with a little push» 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 (seesaw, child, grown up), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:033-levers-lifting-heavy-things-with-a-little-push.lesson:7
# text = A seesaw is a lever with the pivot in the middle, so a child sitting far out can lift a grown-up sitting close in.
# source = school lesson (ours)
# course = physics
# lesson = 033-levers-lifting-heavy-things-with-a-little-push.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	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	seesaw	seesaw	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	lever	lever	NOUN	NN	Number=Sing	0	root	_	_
6	with	with	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	pivot	pivot	NOUN	NN	Number=Sing	5	nmod	_	_
9	in	in	ADP	IN	_	11	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	middle	middle	NOUN	NN	Number=Sing	8	nmod	_	_
12	,	,	PUNCT	,	_	20	punct	_	_
13	so	so	ADV	RB	_	20	advmod	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	15	det	_	_
15	child	child	NOUN	NN	Number=Sing	20	nsubj	_	_
16	sitting	sit	VERB	VBG	VerbForm=Ger	15	acl	_	_
17	far	far	ADV	RB	Degree=Pos	18	advmod	_	_
18	out	out	ADV	RB	_	16	advmod	_	_
19	can	can	AUX	MD	VerbForm=Fin	20	aux	_	_
20	lift	lift	VERB	VB	VerbForm=Inf	5	conj	_	_
21	a	a	DET	DT	Definite=Ind|PronType=Art	24	det	_	_
22	grown	grown	ADJ	JJ	_	24	amod	_	_
23	-	-	PUNCT	HYPH	_	24	punct	_	_
24	up	up	NOUN	NN	Number=Sing	20	obj	_	_
25	sitting	sit	VERB	VBG	VerbForm=Ger	24	acl	_	_
26	close	close	ADV	RB	Degree=Pos	25	advmod	_	_
27	in	in	ADV	RB	_	25	advmod	_	_
28	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | a seesaw | a lever |  |  |  | with the pivot in the middle | tree rules |
| 2 | **sit** | gerund | a child *not said here* |  |  |  |  | out *property* | vn assuming\_position-50 «NP V»: agent=Agent |
| 3 | **lift** | can | a child | a grown up |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent up=Theme |
| 4 | **sit** | gerund | a grown up *not said here* |  |  |  |  | close *property* | vn assuming\_position-50 «NP V»: agent=Agent |

<!-- .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:033-levers-lifting-heavy-things-with-a-little-push.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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