---
title: bulb won't light, wire's come off one end, why — Electricity — circuits, switches and s… · tree and pragmatics
description: bulb won't light, wire's come off one end, why Test 10 · ★★ of lesson 55 «Electricity — circuits, switches and safety» of the world 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 10 · ★★ · Electricity — circuits, switches and safety

<!-- .ven lang=en -->
bulb won't light, wire's come off one end, why

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** bulb · **What happens:** not light, come off · **To what, where:** wire, one end

<!-- .vabout -->
This is test 10 · ★★ of lesson 55 «Electricity — circuits, switches and safety» of the world 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/world/55-electricity/#t10).

## The question {#question}

```conllu
# sent_id = question:world:55-electricity:t10:1
# text = bulb won't light, wire's come off one end, why
1	bulb	bulb	NOUN	NN	Number=Sing	4	nsubj	_	_
2	wo	will	AUX	MD	VerbForm=Fin	4	aux	_	SpaceAfter=No
3	n't	not	PART	RB	Polarity=Neg	4	advmod	_	_
4	light	light	VERB	VB	VerbForm=Inf	0	root	_	SpaceAfter=No
5	,	,	PUNCT	,	_	6	punct	_	_
6	wire	wire	NOUN	NN	Number=Sing	4	obj	_	SpaceAfter=No
7	's	's	PART	POS	_	6	case	_	_
8	come	come	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	advcl	_	_
9	off	off	ADP	IN	_	11	case	_	_
10	one	one	NUM	CD	NumForm=Word|NumType=Card	11	nummod	_	_
11	end	end	NOUN	NN	Number=Sing	8	obl	_	SpaceAfter=No
12	,	,	PUNCT	,	_	13	punct	_	_
13	why	why	ADV	WRB	PronType=Int	4	parataxis	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **light** | future | bulb | wire |  |  |  |  | vn preparing-26.3-1 «NP V NP»: agent=Agent wire=Product |
| 2 | **come off** | participle | bulb *not said here* | one end |  |  |  |  | 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 {#o1}

<!-- .ven lang=en -->
The bulb always needs two batteries to light up at all

```conllu
# sent_id = question:world:55-electricity:t10:o1:1
# text = The bulb always needs two batteries to light up at all
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	bulb	bulb	NOUN	NN	Number=Sing	4	nsubj	_	_
3	always	always	ADV	RB	PronType=Tot	4	advmod	_	_
4	needs	need	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	two	two	NUM	CD	NumForm=Word|NumType=Card	6	nummod	_	_
6	batteries	battery	NOUN	NNS	Number=Plur	4	obj	_	_
7	to	to	PART	TO	_	8	mark	_	_
8	light	light	VERB	VB	VerbForm=Inf	4	xcomp	_	_
9	up	up	ADP	RP	_	8	compound:prt	_	_
10	at	at	ADP	IN	_	11	case	_	_
11	all	all	DET	DT	PronType=Tot	8	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present | the bulb | two batteries |  |  |  | always *property* | tree rules |
| 2 | **light up** *not said to happen* | to-infinitive | two batteries *not said here* |  |  | all |  |  | vn preparing-26.3-1 «NP V NP»: agent=Agent |

### Option 2 {#o2}

<!-- .ven lang=en -->
One wire is enough for a bulb

```conllu
# sent_id = question:world:55-electricity:t10:o2:1
# text = One wire is enough for a bulb
1	One	one	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	wire	wire	NOUN	NN	Number=Sing	4	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
4	enough	enough	ADJ	JJ	Degree=Pos	0	root	_	_
5	for	for	ADP	IN	_	7	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	bulb	bulb	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | One wire |  |  |  |  | for a bulb; enough *property* | tree rules |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
The circuit has a gap, so electricity cannot flow

```conllu
# sent_id = question:world:55-electricity:t10:o3:1
# text = The circuit has a gap, so electricity cannot flow
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	circuit	circuit	NOUN	NN	Number=Sing	3	nsubj	_	_
3	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	gap	gap	NOUN	NN	Number=Sing	3	obj	_	SpaceAfter=No
6	,	,	PUNCT	,	_	11	punct	_	_
7	so	so	ADV	RB	_	11	advmod	_	_
8	electricity	electricity	NOUN	NN	Number=Sing	11	nsubj	_	_
9	can	can	AUX	MD	VerbForm=Fin	11	aux	_	SpaceAfter=No
10	not	not	PART	RB	Polarity=Neg	11	advmod	_	_
11	flow	flow	VERB	VB	VerbForm=Inf	3	parataxis	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | the circuit | a gap |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent gap=Patient |
| 2 | **not** **flow** | can | electricity |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
The battery has gone cold

```conllu
# sent_id = question:world:55-electricity:t10:o4:1
# text = The battery has gone cold
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	battery	battery	NOUN	NN	Number=Sing	4	nsubj	_	_
3	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	_
4	gone	go	VERB	VBN	Tense=Past|VerbForm=Part	0	root	_	_
5	cold	cold	ADJ	JJ	Degree=Pos	4	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **go** | present · perfect | the battery |  |  |  |  | cold *property* | vn disappearance-48.2-1 «NP V»: agent=Theme |

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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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