---
title: Ascertain the phase of the Moon at which a solar eclipse may occur. — Phases, eclipses and tides · tree and pragmatics
description: Ascertain the phase of the Moon at which a solar eclipse may occur. Exam question 2 of lesson 7 «Phases, eclipses and tides» 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 right.
---

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# Exam question 2 · Phases, eclipses and tides

<!-- .ven lang=en -->
Ascertain the phase of the Moon at which a solar eclipse may occur.

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 3 · right ✓ · **Who acts:** you, solar eclipse · **What happens:** ascertain, occur · **To what, where:** phase

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This is exam question 2 of lesson 7 «Phases, eclipses and tides» of the space course of Mova's primary school, asked in stiff, formal language. 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/7-phases-eclipses-and-tides/#e2).

## The question {#question}

```conllu
# sent_id = question:space:7-phases-eclipses-and-tides:e2:1
# text = Ascertain the phase of the Moon at which a solar eclipse may occur.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	phase	phase	NOUN	NN	Number=Sing	1	obj	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	Moon	Moon	PROPN	NNP	Number=Sing	3	nmod	_	_
7	at	at	ADP	IN	_	8	case	_	_
8	which	which	PRON	WDT	PronType=Rel	13	obl	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
10	solar	solar	ADJ	JJ	Degree=Pos	11	amod	_	_
11	eclipse	eclipse	NOUN	NN	Number=Sing	13	nsubj	_	_
12	may	may	AUX	MD	VerbForm=Fin	13	aux	_	_
13	occur	occur	VERB	VB	VerbForm=Inf	3	acl:relcl	_	SpaceAfter=No
14	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the phase of the Moon |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent phase=Topic |
| 2 | **occur** | may | a solar eclipse |  |  | the phase of the Moon |  |  | vn occur-48.3-1 «NP V PP»: agent=Theme at which=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.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Last quarter

```conllu
# sent_id = question:space:7-phases-eclipses-and-tides:e2:o1:1
# text = Last quarter
1	Last	last	ADJ	JJ	Degree=Pos	2	amod	_	_
2	quarter	quarter	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 {#o2}

<!-- .ven lang=en -->
First quarter

```conllu
# sent_id = question:space:7-phases-eclipses-and-tides:e2:o2:1
# text = First quarter
1	First	first	ADV	RB	NumForm=Word|NumType=Ord	2	advmod	_	_
2	quarter	quarter	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 · ← Mova's choice · ✓ the right answer {#o3}

<!-- .ven lang=en -->
New Moon

```conllu
# sent_id = question:space:7-phases-eclipses-and-tides:e2:o3:1
# text = New Moon
1	New	New	ADJ	NNP	Degree=Pos	2	amod	_	_
2	Moon	Moon	PROPN	NNP	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
Full Moon

```conllu
# sent_id = question:space:7-phases-eclipses-and-tides:e2:o4:1
# text = Full Moon
1	Full	full	ADJ	JJ	Degree=Pos	2	amod	_	_
2	Moon	Moon	PROPN	NNP	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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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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- ← previous: [Phases, eclipses and tides, exam 1](https://md.mova.elamur.ai/free/en/corpora/questions/space/7-phases-eclipses-and-tides/e1/)
- next →: [Phases, eclipses and tides, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/space/7-phases-eclipses-and-tides/e3/)
- ↑ back to [Phases, eclipses and tides](https://md.mova.elamur.ai/free/en/corpora/questions/space/7-phases-eclipses-and-tides/)