---
title: Why do we wash our hands even though most bacteria are harmless? — Fungi, bacteria and tiny living things · tree and pragmatics
description: Why do we wash our hands even though most bacteria are harmless? Test 5 · ★ of lesson 77 «Fungi, bacteria and tiny living things» 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 right.
---

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# Test 5 · ★ · Fungi, bacteria and tiny living things

<!-- .ven lang=en -->
Why do we wash our hands even though most bacteria are harmless?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 2 · right ✓ · **Who acts:** we, most bacteria · **What happens:** wash, be · **To what, where:** hands

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This is test 5 · ★ of lesson 77 «Fungi, bacteria and tiny living things» 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/77-fungi-bacteria-tiny-living-things/#t5).

## The question {#question}

```conllu
# sent_id = question:world:77-fungi-bacteria-tiny-living-things:t5:1
# text = Why do we wash our hands even though most bacteria are harmless?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	4	aux	_	_
3	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	4	nsubj	_	_
4	wash	wash	VERB	VB	VerbForm=Inf	0	root	_	_
5	our	our	PRON	PRP$	Case=Gen|Number=Plur|Person=1|Poss=Yes|PronType=Prs	6	nmod:poss	_	_
6	hands	hand	NOUN	NNS	Number=Plur	4	obj	_	_
7	even	even	ADV	RB	_	12	advmod	_	_
8	though	though	SCONJ	IN	_	12	mark	_	_
9	most	most	ADJ	JJS	Degree=Sup	10	amod	_	_
10	bacteria	bacterium	NOUN	NNS	Number=Plur	12	nsubj	_	_
11	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	12	cop	_	_
12	harmless	harmless	ADJ	JJ	Degree=Pos	4	advcl	_	SpaceAfter=No
13	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **wash** | present · do-support | we | our hands |  |  |  |  | vn floss-41.2.1 «NP V NP»: agent=Agent hand=Patient |
| 2 | **is** | present | most bacteria |  |  |  |  | harmless *property* | 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 {#o1}

<!-- .ven lang=en -->
Bacteria make our hands heavy

```conllu
# sent_id = question:world:77-fungi-bacteria-tiny-living-things:t5:o1:1
# text = Bacteria make our hands heavy
1	Bacteria	bacterium	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	our	our	PRON	PRP$	Case=Gen|Number=Plur|Person=1|Poss=Yes|PronType=Prs	4	nmod:poss	_	_
4	hands	hand	NOUN	NNS	Number=Plur	2	obj	_	_
5	heavy	heavy	ADJ	JJ	Degree=Pos	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Bacteria | our hands |  |  |  | heavy *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset hand=Product |

### Option 2 · ← Mova's choice · ✓ the right answer {#o2}

<!-- .ven lang=en -->
A few bacteria can make us ill

```conllu
# sent_id = question:world:77-fungi-bacteria-tiny-living-things:t5:o2:1
# text = A few bacteria can make us ill
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	few	few	ADJ	JJ	Degree=Pos	3	amod	_	_
3	bacteria	bacterium	NOUN	NNS	Number=Plur	5	nsubj	_	_
4	can	can	AUX	MD	VerbForm=Fin	5	aux	_	_
5	make	make	VERB	VB	VerbForm=Inf	0	root	_	_
6	us	we	PRON	PRP	Case=Acc|Number=Plur|Person=1|PronType=Prs	5	obj	_	_
7	ill	ill	ADJ	JJ	Degree=Pos	5	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | can | a few bacteria | us |  |  |  | ill *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset we=Product |

### Option 3 {#o3}

<!-- .ven lang=en -->
Washing feeds the good bacteria

```conllu
# sent_id = question:world:77-fungi-bacteria-tiny-living-things:t5:o3:1
# text = Washing feeds the good bacteria
1	Washing	washing	NOUN	NN	Number=Sing	2	nsubj	_	_
2	feeds	feed	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	good	good	ADJ	JJ	Degree=Pos	5	amod	_	_
5	bacteria	bacteria	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **feed** | present | Washing | the good bacteria |  |  |  |  | vn feeding-39.7 «NP V NP»: agent=Agent bacteria=Recipient |

### Option 4 {#o4}

<!-- .ven lang=en -->
All bacteria are dangerous

```conllu
# sent_id = question:world:77-fungi-bacteria-tiny-living-things:t5:o4:1
# text = All bacteria are dangerous
1	All	all	DET	DT	PronType=Tot	2	det	_	_
2	bacteria	bacterium	NOUN	NNS	Number=Plur	4	nsubj	_	_
3	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
4	dangerous	dangerous	ADJ	JJ	Degree=Pos	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | all bacteria |  |  |  |  | dangerous *property* | tree rules |

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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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