---
title: A computer virus is named after real viruses because it copies itsel… — The microscopic world: viruses and vaccines · tree and pragmatics
description: A computer virus is named after real viruses because it copies itself by getting into a host, a program instead of a cell. Who acts: virus. A sentence of the lesson «The microscopic world: viruses and vaccines» of the biology course of Mova's primary school with its dependency tree and the pragmatic
---

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# The microscopic world: viruses and vaccines, sentence 16

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A computer virus is named after real viruses because it copies itself by getting into a host, a program instead of a cell.

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**Who acts:** virus · **What happens:** name, copy, get · **To what, where:** computer virus, virus, host

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This is a sentence of the lesson «The microscopic world: viruses and vaccines» of the biology course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (virus), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:258-the-microscopic-world-viruses-and-vaccines.lesson:16
# text = A computer virus is named after real viruses because it copies itself by getting into a host, a program instead of a cell.
# source = school lesson (ours)
# course = biology
# lesson = 258-the-microscopic-world-viruses-and-vaccines.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R7-rel-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	computer	computer	NOUN	NN	Number=Sing	3	compound	_	_
3	virus	virus	NOUN	NN	Number=Sing	5	nsubj:pass	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux:pass	_	_
5	named	name	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
6	after	after	ADP	IN	_	8	case	_	_
7	real	real	ADJ	JJ	Degree=Pos	8	amod	_	_
8	viruses	virus	NOUN	NNS	Number=Plur	5	obl	_	_
9	because	because	SCONJ	IN	_	11	mark	_	_
10	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	nsubj	_	_
11	copies	copy	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	advcl	_	_
12	itself	itself	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs|Reflex=Yes	11	obj	_	_
13	by	by	SCONJ	IN	_	14	mark	_	_
14	getting	get	VERB	VBG	Tense=Pres|VerbForm=Part	11	advcl	_	_
15	into	into	ADP	IN	_	17	case	_	_
16	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
17	host	host	NOUN	NN	Number=Sing	14	obl	_	_
18	,	,	PUNCT	,	_	20	punct	_	_
19	a	a	DET	DT	Definite=Ind|PronType=Art	20	det	_	_
20	program	program	NOUN	NN	Number=Sing	17	appos	_	Agree=R7-rel-agree|Haiku=17:conj
21	instead	instead	ADV	RB	ExtPos=ADP	24	case	_	_
22	of	of	ADP	IN	_	21	fixed	_	_
23	a	a	DET	DT	Definite=Ind|PronType=Art	24	det	_	_
24	cell	cell	NOUN	NN	Number=Sing	14	obl	_	_
25	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **name** | present · passive |  | a computer virus |  |  | after real viruses |  | vn appoint-29.1 «NP V NP»: subject=Theme |
| 2 | **copy** | present | virus | virus |  |  |  |  | vn scribble-25.2 «NP V NP»: agent=Agent itself=Theme |
| 3 | **get** | gerund | virus *not said here* |  |  | a host |  | instead a cell | vn escape-51.1 «NP V PP.destination»: agent=Theme into host=Destination |

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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.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:biology:258-the-microscopic-world-viruses-and-vaccines.lesson:16`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R7-rel-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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