---
title: Why does Dragonfly need to fly instead of drive? — Saturn's moons · tree and pragmatics
description: Why does Dragonfly need to fly instead of drive? Test 8 of lesson 13 «Saturn's moons» of the space course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/space/13-saturns-moons/t8/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [Space](https://md.mova.elamur.ai/free/en/corpora/questions/space/) / [Saturn's moons](https://md.mova.elamur.ai/free/en/corpora/questions/space/13-saturns-moons/) / t8

# Test 8 · Saturn's moons

<!-- .ven lang=en -->
Why does Dragonfly need to fly instead of drive?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 4 · wrong ✗ · **Who acts:** Dragonfly · **What happens:** need, fly

<!-- .vabout -->
This is test 8 of lesson 13 «Saturn's moons» of the space 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/space/13-saturns-moons/#t8).

## The question {#question}

```conllu
# sent_id = question:space:13-saturns-moons:t8:1
# text = Why does Dragonfly need to fly instead of drive?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	_
3	Dragonfly	Dragonfly	PROPN	NNP	Number=Sing	4	nsubj	_	_
4	need	need	VERB	VB	VerbForm=Inf	0	root	_	_
5	to	to	PART	TO	_	6	mark	_	_
6	fly	fly	VERB	VB	VerbForm=Inf	4	xcomp	_	_
7	instead	instead	ADV	RB	ExtPos=ADP	9	case	_	_
8	of	of	ADP	IN	_	7	fixed	_	_
9	drive	drive	NOUN	NN	Number=Sing	6	obl	_	SpaceAfter=No
10	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present · do-support | Dragonfly |  |  |  |  |  | vn want-32.1-1-1 «NP V NP S\_INF»: agent=Pivot clause=Theme |
| 2 | **fly** *not said to happen* | to-infinitive | Dragonfly *not said here* |  |  |  |  | instead drive | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |

<!-- .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 {#o1}

<!-- .ven lang=en -->
Because wheels melt on Titan

```conllu
# sent_id = question:space:13-saturns-moons:t8:o1:1
# text = Because wheels melt on Titan
1	Because	because	SCONJ	IN	_	3	mark	_	_
2	wheels	wheel	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	melt	melt	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	on	on	ADP	IN	_	5	case	_	_
5	Titan	Titan	PROPN	NNP	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **melt** | present | wheels |  |  | Titan |  |  | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient |

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
Because flying is not possible on Earth

```conllu
# sent_id = question:space:13-saturns-moons:t8:o2:1
# text = Because flying is not possible on Earth
1	Because	because	SCONJ	IN	_	5	mark	_	_
2	flying	fly	VERB	VBG	VerbForm=Ger	5	amod	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
5	possible	possible	ADJ	JJ	Degree=Pos	0	root	_	_
6	on	on	ADP	IN	_	7	case	_	_
7	Earth	Earth	PROPN	NNP	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fly** | gerund |  |  |  |  |  |  | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |
| 2 | **not** **is** | present |  |  |  | Earth |  | possible *property* | tree rules |

### Option 3 {#o3}

<!-- .ven lang=en -->
Because Titan has no solid ground at all

```conllu
# sent_id = question:space:13-saturns-moons:t8:o3:1
# text = Because Titan has no solid ground at all
1	Because	because	SCONJ	IN	_	3	mark	_	_
2	Titan	Titan	PROPN	NNP	Number=Sing	3	nsubj	_	_
3	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	no	no	DET	DT	PronType=Neg	6	det	_	_
5	solid	solid	ADJ	JJ	Degree=Pos	6	amod	_	_
6	ground	ground	NOUN	NN	Number=Sing	3	obj	_	_
7	at	at	ADP	IN	_	8	case	_	_
8	all	all	DET	DT	PronType=Tot	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Titan | no solid ground |  | all |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent ground=Patient |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
To hop between sites far apart on Titan

```conllu
# sent_id = question:space:13-saturns-moons:t8:o4:1
# text = To hop between sites far apart on Titan
1	To	to	PART	TO	_	2	mark	_	_
2	hop	hop	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	between	between	ADP	IN	_	4	case	_	_
4	sites	site	NOUN	NNS	Number=Plur	2	obl	_	_
5	far	far	ADV	RB	Degree=Pos	6	advmod	_	_
6	apart	apart	ADV	RB	_	2	advmod	_	_
7	on	on	ADP	IN	_	8	case	_	_
8	Titan	Titan	PROPN	NNP	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hop** | to-infinitive |  |  |  | Titan |  | between sites; apart *property* | vn run-51.3.2-1 «NP V PP.location»: agent=Theme between site=Trajectory |

<!-- div src -->

**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.

<!-- /div -->

<!-- pn -->
- ← previous: [Saturn's moons, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/space/13-saturns-moons/t7/)
- next →: [Saturn's moons, test 9](https://md.mova.elamur.ai/free/en/corpora/questions/space/13-saturns-moons/t9/)
- ↑ back to [Saturn's moons](https://md.mova.elamur.ai/free/en/corpora/questions/space/13-saturns-moons/)