---
title: Jet lag happens when the body clock doesn't match the local clock af… — Sleep and the body clock · tree and pragmatics
description: Jet lag happens when the body clock doesn't match the local clock after flying across time zones; flying east is often harder. Who acts: Jet lag, body clock, flying. 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 prag
---

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# Sleep and the body clock, sentence 18

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Jet lag happens when the body clock doesn't match the local clock after flying across time zones; flying east is often harder.

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**Who acts:** Jet lag, body clock, flying · **What happens:** happen, not match, fly, be · **To what, where:** local clock, time zones, east

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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 (Jet lag, body clock, flying), 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:18
# text = Jet lag happens when the body clock doesn't match the local clock after flying across time zones; flying east is often harder.
# 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	Jet	jet	NOUN	NN	Number=Sing	2	compound	_	_
2	lag	lag	NOUN	NN	Number=Sing	3	nsubj	_	_
3	happens	happen	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	when	when	ADV	WRB	PronType=Int	10	advmod	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
6	body	body	NOUN	NN	Number=Sing	7	compound	_	_
7	clock	clock	NOUN	NN	Number=Sing	10	nsubj	_	_
8	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	aux	_	_
9	n't	not	PART	RB	Polarity=Neg	10	advmod	_	_
10	match	match	VERB	VB	VerbForm=Inf	3	advcl	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
12	local	local	ADJ	JJ	Degree=Pos	13	amod	_	_
13	clock	clock	NOUN	NN	Number=Sing	10	obj	_	_
14	after	after	SCONJ	IN	_	15	mark	_	_
15	flying	fly	VERB	VBG	Tense=Pres|VerbForm=Part	10	advcl	_	_
16	across	across	ADP	IN	_	18	case	_	_
17	time	time	NOUN	NN	Number=Sing	18	compound	_	_
18	zones	zone	NOUN	NNS	Number=Plur	15	obl	_	_
19	;	;	PUNCT	,	_	24	punct	_	_
20	flying	fly	VERB	VBG	VerbForm=Ger	24	csubj	_	_
21	east	east	NOUN	NN	Number=Sing	20	obj	_	_
22	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	24	cop	_	_
23	often	often	ADV	RB	_	24	advmod	_	_
24	harder	hard	ADJ	JJR	Degree=Cmp	3	parataxis	_	Agree=R7-rel-agree|Haiku=3:conj
25	.	.	PUNCT	.	_	3	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 | **happen** | present | Jet lag |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **not** **match** | present · do-support | the body clock | the local clock |  |  |  |  | vn amalgamate-22.2-1 «NP V NP»: agent=Agent clock=Patient |
| 3 | **fly** | gerund | the body clock *not said here* |  |  | time zones |  |  | vn run-51.3.2-2-1 «NP V PP.location»: agent=Theme across zone=Trajectory |
| 4 | **fly** | gerund |  | east |  |  |  |  | vn spatial\_configuration-47.6-1 «PP.location V NP»: agent=Location east=Theme |
| 5 | **is** | present | flying |  |  |  |  | hard, often *property* | tree rules |

<!-- .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:world:127-sleep-and-the-body-clock.lesson:18`.

**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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