---
title: On a flat beach the tide can come back in faster than you can walk,… — Seasons and tides · tree and pragmatics
description: On a flat beach the tide can come back in faster than you can walk, so always check the tide times before you explore a sandbank. Who acts: tide, you. A sentence of the lesson «Seasons and tides» of the physics course of Mova's primary school with its dependency tree and the pragmatics of every clau
---

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# Seasons and tides, sentence 4

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On a flat beach the tide can come back in faster than you can walk, so always check the tide times before you explore a sandbank.

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**Who acts:** tide, you · **What happens:** come back, walk, check, explore · **To what, where:** flat beach, sandbank

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This is a sentence of the lesson «Seasons and tides» 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 (tide, you), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:040-seasons-and-tides.lesson:4
# text = On a flat beach the tide can come back in faster than you can walk, so always check the tide times before you explore a sandbank.
# source = school lesson (ours)
# course = physics
# lesson = 040-seasons-and-tides.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	On	on	ADP	IN	_	4	case	_	_
2	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
3	flat	flat	ADJ	JJ	Degree=Pos	4	amod	_	_
4	beach	beach	NOUN	NN	Number=Sing	8	obl	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	tide	tide	NOUN	NN	Number=Sing	8	nsubj	_	_
7	can	can	AUX	MD	VerbForm=Fin	8	aux	_	_
8	come	come	VERB	VB	VerbForm=Inf	0	root	_	_
9	back	back	ADV	RB	_	8	advmod	_	_
10	in	in	ADP	IN	_	11	case	_	_
11	faster	fast	ADJ	JJR	Degree=Cmp	8	obl	_	_
12	than	than	SCONJ	IN	_	15	mark	_	_
13	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	15	nsubj	_	_
14	can	can	AUX	MD	VerbForm=Fin	15	aux	_	_
15	walk	walk	VERB	VB	VerbForm=Inf	11	advcl	_	_
16	,	,	PUNCT	,	_	19	punct	_	_
17	so	so	ADV	RB	_	19	advmod	_	_
18	always	always	ADV	RB	PronType=Tot	19	advmod	_	_
19	check	check	VERB	VB	Mood=Imp|VerbForm=Fin	8	parataxis	_	_
20	the	the	DET	DT	Definite=Def|PronType=Art	22	det	_	_
21	tide	tide	NOUN	NN	Number=Sing	22	compound	_	_
22	times	time	NOUN	NNS	Number=Plur	19	obj	_	Agree=R7-rel-agree|Haiku=19:obl:unmarked
23	before	before	SCONJ	IN	_	25	mark	_	_
24	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	25	nsubj	_	_
25	explore	explore	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	19	advcl	_	_
26	a	a	DET	DT	Definite=Ind|PronType=Art	27	det	_	_
27	sandbank	sandbank	NOUN	NN	Number=Sing	25	obj	_	_
28	.	.	PUNCT	.	_	8	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 | **come back** | can | the tide |  |  | a flat beach |  | in faster | vn appear-48.1.1 «NP V PP.location»: agent=Theme on beach=Location |
| 2 | **walk** | can | you |  |  |  |  |  | vn run-51.3.2-2-1 «NP V»: agent=Theme |
| 3 | **check** | infinitive |  |  |  |  | time | always *property* | vn assessment-34.1 «NP V NP»: agent=Agent |
| 4 | **explore** | present | you | a sandbank |  |  |  |  | vn investigate-35.4 «NP V NP.location»: agent=Agent sandbank=Location |

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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:physics:040-seasons-and-tides.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): 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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