---
title: Teenagers need about 8 to 10 hours, but their body clock shifts late… — Sleep and the body clock · tree and pragmatics
description: Teenagers need about 8 to 10 hours, but their body clock shifts later, so they feel sleepy later at night. Who acts: Teenagers, body clock. A sentence of the lesson «Sleep and the body clock» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Sleep and the body clock, sentence 13

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Teenagers need about 8 to 10 hours, but their body clock shifts later, so they feel sleepy later at night.

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**Who acts:** Teenagers, body clock · **What happens:** need, shift, feel

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This is a sentence of the lesson «Sleep and the body clock» 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 (Teenagers, body clock), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:127-sleep-and-the-body-clock.lesson:13
# text = Teenagers need about 8 to 10 hours, but their body clock shifts later, so they feel sleepy later at night.
# source = school lesson (ours)
# course = world
# lesson = 127-sleep-and-the-body-clock.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): R7-rel-agree ×1
1	Teenagers	teenager	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	about	about	ADV	RB	_	4	advmod	_	_
4	8	8	NUM	CD	NumForm=Digit|NumType=Card	7	nummod	_	_
5	to	to	ADP	IN	_	6	case	_	_
6	10	10	NUM	CD	NumForm=Digit|NumType=Card	4	nmod	_	_
7	hours	hour	NOUN	NNS	Number=Plur	2	obj	_	Agree=R7-rel-agree|Haiku=2:obl:unmarked
8	,	,	PUNCT	,	_	13	punct	_	_
9	but	but	CCONJ	CC	_	13	cc	_	_
10	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	12	nmod:poss	_	_
11	body	body	NOUN	NN	Number=Sing	12	compound	_	_
12	clock	clock	NOUN	NN	Number=Sing	13	nsubj	_	_
13	shifts	shift	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
14	later	late	ADV	RBR	Degree=Cmp	13	advmod	_	_
15	,	,	PUNCT	,	_	18	punct	_	_
16	so	so	ADV	RB	_	18	advmod	_	_
17	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	18	nsubj	_	_
18	feel	feel	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
19	sleepy	sleepy	ADJ	JJ	Degree=Pos	18	xcomp	_	_
20	later	late	ADV	RBR	Degree=Cmp	18	advmod	_	_
21	at	at	ADP	IN	_	22	case	_	_
22	night	night	NOUN	NN	Number=Sing	18	obl	_	_
23	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

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

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present | Teenagers |  |  |  | hour |  | vn want-32.1-1-1 «NP V NP S\_INF»: agent=Pivot |
| 2 | **shift** | present | teenagers's body clock |  |  |  |  | late *property* | vn caused\_calibratable\_cos-45.6.2-1 «NP V ADV-Middle»: agent=Patient |
| 3 | **feel** | present | teenagers *= teenager* |  |  |  | night | late, sleepy *property* | vn stimulus\_subject-30.4 «NP V ADJ»: agent=Stimulus |

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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:127-sleep-and-the-body-clock.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): R7-rel-agree ×1. **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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