---
title: «beaver's teeth'd get worn down to nothing chewing trees» What is ri… — Rivers, lakes and ponds · tree and pragmatics
description: «beaver's teeth'd get worn down to nothing chewing trees» What is right? Test 8 · ★★★ of lesson 10 «Rivers, lakes and ponds» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Test 8 · ★★★ · Rivers, lakes and ponds

<!-- .ven lang=en -->
«beaver's teeth'd get worn down to nothing chewing trees» What is right?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **What happens:** wear down, chew, be · **To what, where:** teeth

<!-- .vabout -->
This is test 8 · ★★★ of lesson 10 «Rivers, lakes and ponds» of the biology course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/biology/10-rivers-lakes-and-ponds/#t8).

## The question {#question}

```conllu
# sent_id = question:biology:10-rivers-lakes-and-ponds:t8:1
# text = «beaver's teeth'd get worn down to nothing chewing trees» What is right?
1	«	«	PUNCT	``	_	7	punct	_	SpaceAfter=No
2	beaver	beaver	NOUN	NN	Number=Sing	4	nmod:poss	_	SpaceAfter=No
3	's	's	PART	POS	_	2	case	_	_
4	teeth	tooth	NOUN	NNS	Number=Plur	7	nsubj:pass	_	SpaceAfter=No
5	'd	would	AUX	MD	VerbForm=Fin	7	aux	_	_
6	get	get	AUX	VB	VerbForm=Inf	7	aux:pass	_	_
7	worn	wear	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	16	advcl	_	_
8	down	down	ADP	RP	_	7	compound:prt	_	_
9	to	to	ADP	IN	_	10	case	_	_
10	nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	7	obj	_	_
11	chewing	chew	VERB	VBG	VerbForm=Ger	12	amod	_	_
12	trees	tree	NOUN	NNS	Number=Plur	10	obj	_	SpaceAfter=No
13	»	»	PUNCT	''	_	7	punct	_	_
14	What	what	PRON	WP	PronType=Int	16	nsubj	_	_
15	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	16	cop	_	_
16	right	right	ADJ	JJ	Degree=Pos	0	root	_	SpaceAfter=No
17	?	?	PUNCT	.	_	16	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **wear down** *in a quote* | would · passive |  | beaver's teeth |  |  |  |  | tree rules |
| 2 | **chew** *in a quote* | gerund |  |  |  |  |  |  | vn chew-39.2 «NP V»: agent=Agent |
| 3 | **is** | present |  |  |  |  |  | right *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.

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
They never stop growing, and the iron makes them extra strong

```conllu
# sent_id = question:biology:10-rivers-lakes-and-ponds:t8:o1:1
# text = They never stop growing, and the iron makes them extra strong
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	_	_
2	never	never	ADV	RB	PronType=Neg	3	advmod	_	_
3	stop	stop	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	growing	grow	VERB	VBG	VerbForm=Ger	3	xcomp	_	SpaceAfter=No
5	,	,	PUNCT	,	_	9	punct	_	_
6	and	and	CCONJ	CC	_	9	cc	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	iron	iron	NOUN	NN	Number=Sing	9	nsubj	_	_
9	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	advcl	_	_
10	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	9	obj	_	_
11	extra	extra	ADV	RB	_	12	advmod	_	_
12	strong	strong	ADJ	JJ	Degree=Pos	9	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **stop** | present | They |  |  |  |  |  | vn stop-55.4-1-1 «NP V S\_ING»: agent=Affector clause=Eventuality |
| 2 | **grow** | gerund | They *not said here* |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |
| 3 | **make** | present | the iron | them *= they* |  |  |  | strong *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset they=Product |

### Option 2 {#o2}

<!-- .ven lang=en -->
Beavers grow new teeth every week

```conllu
# sent_id = question:biology:10-rivers-lakes-and-ponds:t8:o2:1
# text = Beavers grow new teeth every week
1	Beavers	beaver	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	grow	grow	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	new	new	ADJ	JJ	Degree=Pos	4	amod	_	_
4	teeth	tooth	NOUN	NNS	Number=Plur	2	obj	_	_
5	every	every	DET	DT	PronType=Tot	6	det	_	_
6	week	week	NOUN	NN	Number=Sing	2	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **grow** | present | Beavers | new teeth |  |  | week |  | vn appear-48.1.1 «PP.location V NP»: agent=Location tooth=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
Beavers use their claws, not teeth

```conllu
# sent_id = question:biology:10-rivers-lakes-and-ponds:t8:o3:1
# text = Beavers use their claws, not teeth
1	Beavers	beaver	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	use	use	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	4	nmod:poss	_	_
4	claws	claw	NOUN	NNS	Number=Plur	2	obj	_	SpaceAfter=No
5	,	,	PUNCT	,	_	7	punct	_	_
6	not	not	PART	RB	Polarity=Neg	7	advmod	_	_
7	teeth	tooth	NOUN	NNS	Number=Plur	4	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **use** | present | Beavers | Beavers's claws and teeth |  |  |  |  | vn eat-39.1 «NP V NP»: agent=Agent claw=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Yes, old beavers have no teeth left and must eat soft water plants

```conllu
# sent_id = question:biology:10-rivers-lakes-and-ponds:t8:o4:1
# text = Yes, old beavers have no teeth left and must eat soft water plants
1	Yes	yes	INTJ	UH	Polarity=Pos	5	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	old	old	ADJ	JJ	Degree=Pos	4	amod	_	_
4	beavers	beaver	NOUN	NNS	Number=Plur	5	nsubj	_	_
5	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	no	no	DET	DT	PronType=Neg	7	det	_	_
7	teeth	tooth	NOUN	NNS	Number=Plur	5	obj	_	_
8	left	leave	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	acl	_	_
9	and	and	CCONJ	CC	_	11	cc	_	_
10	must	must	AUX	MD	VerbForm=Fin	11	aux	_	_
11	eat	eat	VERB	VB	VerbForm=Inf	5	conj	_	_
12	soft	soft	ADJ	JJ	Degree=Pos	14	amod	_	_
13	water	water	NOUN	NN	Number=Sing	14	compound	_	_
14	plants	plant	NOUN	NNS	Number=Plur	11	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | old beavers | no teeth |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent tooth=Patient |
| 2 | **leave** | participle |  | no teeth *not said here* |  |  |  |  | vn escape-51.1-1-1 «NP V»: agent=Theme |
| 3 | **eat** | must | old beavers *not said here* | soft water plants |  |  |  |  | vn eat-39.1-1 «NP V NP»: agent=Agent plant=Patient |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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