---
title: Shadows change during the day because the Sun's position in the sky… — Mirrors, shadows and colours · tree and pragmatics
description: Shadows change during the day because the Sun's position in the sky changes. Who acts: Shadows, position. A sentence of the lesson «Mirrors, shadows and colours» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Mirrors, shadows and colours, sentence 4

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Shadows change during the day because the Sun's position in the sky changes.

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**Who acts:** Shadows, position · **What happens:** change

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This is a sentence of the lesson «Mirrors, shadows and colours» of the world 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 (Shadows, position), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:084-mirrors-shadows-colours.lesson:4
# text = Shadows change during the day because the Sun's position in the sky changes.
# source = school lesson (ours)
# course = world
# lesson = 084-mirrors-shadows-colours.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	Shadows	shadow	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	change	change	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	during	during	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	day	day	NOUN	NN	Number=Sing	2	obl	_	_
6	because	because	SCONJ	IN	_	14	mark	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	Sun	Sun	PROPN	NNP	Number=Sing	10	nmod:poss	_	_
9	's	's	PART	POS	_	8	case	_	_
10	position	position	NOUN	NN	Number=Sing	14	nsubj	_	_
11	in	in	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
13	sky	sky	NOUN	NN	Number=Sing	10	nmod	_	_
14	changes	change	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	advcl	_	_
15	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

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No stored speech act for this sentence.

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **change** | present | Shadows |  |  |  | day |  | vn dress-41.1.1-1-1 «NP V»: agent=Agent |
| 2 | **change** | present | the Sun's position in sky |  |  |  |  |  | vn dress-41.1.1-1-1 «NP V»: agent=Agent |

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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:world:084-mirrors-shadows-colours.lesson:4`.

**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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