---
title: The boat cannot cross empty, so after every trip across except the l… — Crossing the river with one boat · tree and pragmatics
description: The boat cannot cross empty, so after every trip across except the last one somebody must row it back. Who acts: boat, somebody. A sentence of the lesson «Crossing the river with one boat» of the lessons course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Crossing the river with one boat, sentence 0

<!-- .ven lang=en -->
The boat cannot cross empty, so after every trip across except the last one somebody must row it back.

<!-- .vintro -->
**Who acts:** boat, somebody · **What happens:** not cross, row back · **To what, where:** boat

<!-- .vabout -->
This is a sentence of the lesson «Crossing the river with one boat» of the lessons 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 (boat, somebody), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:lessons:189-boat-crossings.lesson:0
# text = The boat cannot cross empty, so after every trip across except the last one somebody must row it back.
# source = school lesson (ours)
# course = lessons
# lesson = 189-boat-crossings.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	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	boat	boat	NOUN	NN	Number=Sing	5	nsubj	_	_
3	can	can	AUX	MD	VerbForm=Fin	5	aux	_	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
5	cross	cross	VERB	VB	VerbForm=Inf	0	root	_	_
6	empty	empty	ADJ	JJ	Degree=Pos	5	xcomp	_	_
7	,	,	PUNCT	,	_	19	punct	_	_
8	so	so	ADV	RB	_	19	advmod	_	_
9	after	after	ADP	IN	_	11	case	_	_
10	every	every	DET	DT	PronType=Tot	11	det	_	_
11	trip	trip	NOUN	NN	Number=Sing	19	obl	_	_
12	across	across	ADV	RB	_	11	advmod	_	_
13	except	except	ADP	IN	_	16	case	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
15	last	last	ADJ	JJ	Degree=Pos	16	amod	_	_
16	one	one	NOUN	NN	Number=Sing	11	nmod	_	_
17	somebody	somebody	PRON	NN	Number=Sing|PronType=Ind	19	nsubj	_	_
18	must	must	AUX	MD	VerbForm=Fin	19	aux	_	_
19	row	row	VERB	VB	VerbForm=Inf	5	parataxis	_	Agree=R7-rel-agree|Haiku=5:conj
20	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	19	obj	_	_
21	back	back	ADV	RB	_	19	advmod	_	_
22	.	.	PUNCT	.	_	5	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 | **not** **cross** | can | the boat |  |  |  |  | empty *property* | vn contiguous\_location-47.8-1 «NP V»: agent=Theme |
| 2 | **row back** | must | somebody | boat |  |  | after every trip except the last one |  | vn nonvehicle-51.4.2 «NP V NP.location»: agent=Agent it=Location |

<!-- .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:lessons:189-boat-crossings.lesson:0`.

**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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- ← previous: [The longest equal pieces, 1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/188-longest-equal-pieces-gcd/1/)
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