---
title: What would happen if a helicopter lost its tail rotor? — Airports, the black box, helicopters a… · tree and pragmatics
description: What would happen if a helicopter lost its tail rotor? Test 7 of lesson 23 «Airports, the black box, helicopters and drones» of the technology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 7 · Airports, the black box, helicopters and drones

<!-- .ven lang=en -->
What would happen if a helicopter lost its tail rotor?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** helicopter · **What happens:** happen, lose · **To what, where:** tail rotor

<!-- .vabout -->
This is test 7 of lesson 23 «Airports, the black box, helicopters and drones» of the technology 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/technology/23-airports-black-box-helicopters-drones/#t7).

## The question {#question}

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:t7:1
# text = What would happen if a helicopter lost its tail rotor?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	happen	happen	VERB	VB	VerbForm=Inf	0	root	_	_
4	if	if	SCONJ	IN	_	7	mark	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
6	helicopter	helicopter	NOUN	NN	Number=Sing	7	nsubj	_	_
7	lost	lose	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	3	advcl	_	_
8	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	10	nmod:poss	_	_
9	tail	tail	NOUN	NN	Number=Sing	10	compound	_	_
10	rotor	rotor	NOUN	NN	Number=Sing	7	obj	_	SpaceAfter=No
11	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | would |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **lose** *a condition, not said to happen* | past | a helicopter | helicopter's tail rotor |  |  |  |  | vn succeed-74-3-1 «NP V NP»: agent=Agent rotor=Eventuality |

<!-- .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 {#o1}

<!-- .ven lang=en -->
Nothing at all, the tail rotor is only there for decoration and balance

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:t7:o1:1
# text = Nothing at all, the tail rotor is only there for decoration and balance
1	Nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	0	root	_	_
2	at	at	ADP	IN	_	3	case	_	_
3	all	all	DET	DT	PronType=Tot	1	nmod	_	SpaceAfter=No
4	,	,	PUNCT	,	_	10	punct	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
6	tail	tail	NOUN	NN	Number=Sing	7	compound	_	_
7	rotor	rotor	NOUN	NN	Number=Sing	10	nsubj	_	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	cop	_	_
9	only	only	ADV	RB	_	10	advmod	_	_
10	there	there	ADV	RB	PronType=Dem	1	parataxis	_	_
11	for	for	ADP	IN	_	12	case	_	_
12	decoration	decoration	NOUN	NN	Number=Sing	10	obl	_	_
13	and	and	CCONJ	CC	_	14	cc	_	_
14	balance	balance	NOUN	NN	Number=Sing	12	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | the tail rotor |  |  |  |  | for decoration and balance; there *property* | tree rules |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
The body would start spinning round under the main rotor

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:t7:o2:1
# text = The body would start spinning round under the main rotor
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	body	body	NOUN	NN	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	start	start	VERB	VB	VerbForm=Inf	0	root	_	_
5	spinning	spin	VERB	VBG	VerbForm=Ger	4	xcomp	_	_
6	round	round	ADV	RB	_	5	advmod	_	_
7	under	under	ADP	IN	_	10	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
9	main	main	ADJ	JJ	Degree=Pos	10	amod	_	_
10	rotor	rotor	NOUN	NN	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **start** | would | the body |  |  |  |  |  | vn begin-55.1-1-1 «NP V S\_ING»: agent=Agent clause=Eventuality |
| 2 | **spin round** | gerund | the body *not said here* |  |  | the main rotor |  | round *property* | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme under rotor=Trajectory |

### Option 3 {#o3}

<!-- .ven lang=en -->
It would rise straight up much faster

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:t7:o3:1
# text = It would rise straight up much faster
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	rise	rise	VERB	VB	VerbForm=Inf	0	root	_	_
4	straight	straight	ADV	RB	_	5	advmod	_	_
5	up	up	ADV	RB	_	3	advmod	_	_
6	much	much	ADV	RB	_	7	advmod	_	_
7	faster	fast	ADV	RBR	Degree=Cmp	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rise** | would | It |  |  |  |  | fast *property* | vn assuming\_position-50 «NP V»: agent=Agent |

### Option 4 {#o4}

<!-- .ven lang=en -->
It would fly faster forward

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:t7:o4:1
# text = It would fly faster forward
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	fly	fly	VERB	VB	VerbForm=Inf	0	root	_	_
4	faster	fast	ADV	RBR	Degree=Cmp	3	advmod	_	_
5	forward	forward	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fly** | would | It |  |  |  |  | fast, forward *property* | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |

<!-- 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 -->

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- ← previous: [Airports, the black box, helicopters a…, test 6](https://md.mova.elamur.ai/free/en/corpora/questions/technology/23-airports-black-box-helicopters-drones/t6/)
- next →: [Airports, the black box, helicopters a…, test 8](https://md.mova.elamur.ai/free/en/corpora/questions/technology/23-airports-black-box-helicopters-drones/t8/)
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