---
title: That one rule explains the famous double letters. dis + appear = dis… — Prefixes: un-, dis-, mis-, re-, pre-, in-, im-,… · tree and pragmatics
description: That one rule explains the famous double letters. dis + appear = disappear (one s, because «appear» has none), but dis + satisfied = dissatisfied (two s's). mis + spell = misspell, with both s's. il + legal = illegal, ir + regular = irregular, im + mature = immature. Who acts: one rule. A sentence o
---

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# Prefixes: un-, dis-, mis-, re-, pre-, in-, im-, il-, ir-, sentence 3

<!-- .ven lang=en -->
That one rule explains the famous double letters. dis + appear = disappear (one s, because «appear» has none), but dis + satisfied = dissatisfied (two s's). mis + spell = misspell, with both s's. il + legal = illegal, ir + regular = irregular, im + mature = immature.

<!-- .vintro -->
**Who acts:** one rule · **What happens:** explain, appear, disappear, have, misspell · **To what, where:** famous double letters, one, none, s · **Speech:** someone speaks here

<!-- .vabout -->
This is a sentence of the lesson «Prefixes: un-, dis-, mis-, re-, pre-, in-, im-, il-, ir-» of the english 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 (one rule), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:english:012-prefixes-un-dis-mis-re-pre-in-im-il-ir.lesson:3
# text = That one rule explains the famous double letters. dis + appear = disappear (one s, because «appear» has none), but dis + satisfied = dissatisfied (two s's). mis + spell = misspell, with both s's. il + legal = illegal, ir + regular = irregular, im + mature = immature.
# source = school lesson (ours)
# course = english
# lesson = 012-prefixes-un-dis-mis-re-pre-in-im-il-ir.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): R6-punct-agree ×1, R7-rel-agree ×1
1	That	that	DET	DT	Number=Sing|PronType=Dem	3	det	_	_
2	one	one	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	rule	rule	NOUN	NN	Number=Sing	4	nsubj	_	_
4	explains	explain	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
6	famous	famous	ADJ	JJ	Degree=Pos	8	amod	_	_
7	double	double	ADJ	JJ	Degree=Pos	8	amod	_	_
8	letters	letter	NOUN	NNS	Number=Plur	4	obj	_	_
9	.	.	PUNCT	.	_	10	punct	_	_
10	dis	dis	NOUN	NN	Number=Sing	4	obl	_	_
11	+	+	SYM	SYM	_	12	cc	_	_
12	appear	appear	VERB	VB	VerbForm=Inf	10	conj	_	_
13	=	=	PUNCT	,	_	14	punct	_	_
14	disappear	disappear	VERB	VB	VerbForm=Inf	12	xcomp	_	_
15	(	(	PUNCT	-LRB-	_	16	punct	_	_
16	one	one	NUM	CD	NumForm=Word|NumType=Card	14	obj	_	_
17	s	's	NOUN	NN	Number=Sing	16	case	_	_
18	,	,	PUNCT	,	_	21	punct	_	_
19	because	because	SCONJ	IN	_	21	mark	_	_
20	«	«	PUNCT	``	_	21	punct	_	_
21	appear	appear	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	14	conj	_	_
22	»	»	PUNCT	''	_	21	punct	_	Agree=R6-punct-agree|Haiku=23:punct
23	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	21	ccomp	_	_
24	none	none	PRON	NN	PronType=Neg	23	obj	_	_
25	)	)	PUNCT	-RRB-	_	23	punct	_	_
26	,	,	PUNCT	,	_	30	punct	_	_
27	but	but	CCONJ	CC	_	30	cc	_	_
28	dis	dis	NOUN	NN	Number=Sing	30	obl:unmarked	_	_
29	+	+	SYM	SYM	_	28	compound	_	_
30	satisfied	satisfied	ADJ	JJ	Degree=Pos	4	conj	_	_
31	=	=	PUNCT	,	_	32	punct	_	_
32	dissatisfied	dissatisfied	ADJ	JJ	Degree=Pos	30	conj	_	_
33	(	(	PUNCT	-LRB-	_	34	punct	_	_
34	two	two	NUM	CD	NumForm=Word|NumType=Card	4	appos	_	_
35	s	s	NOUN	NN	Number=Sing	34	nmod:unmarked	_	_
36	's	's	PART	POS	_	35	case	_	_
37	)	)	PUNCT	-RRB-	_	34	punct	_	_
38	.	.	PUNCT	.	_	39	punct	_	_
39	mis	mi	NOUN	NNS	Number=Plur	4	obj	_	_
40	+	+	SYM	SYM	_	41	cc	_	Agree=R7-rel-agree|Haiku=41:case
41	spell	spell	NOUN	NN	Number=Sing	39	nmod	_	_
42	=	=	PUNCT	,	_	43	punct	_	_
43	misspell	misspell	VERB	VB	VerbForm=Inf	39	conj	_	_
44	,	,	PUNCT	,	_	47	punct	_	_
45	with	with	ADP	IN	_	47	case	_	_
46	both	both	DET	DT	PronType=Tot	47	det	_	_
47	s	s	NOUN	NN	Number=Sing	43	obj	_	_
48	's	's	PART	POS	_	47	case	_	_
49	.	.	PUNCT	.	_	43	punct	_	_
50	il	IL	PROPN	NNP	Number=Sing	43	obj	_	_
51	+	+	SYM	SYM	_	52	case	_	_
52	legal	legal	ADJ	JJ	Degree=Pos	43	obl	_	_
53	=	=	PUNCT	,	_	56	punct	_	_
54	illegal	illegal	ADJ	JJ	Degree=Pos	56	amod	_	_
55	,	,	PUNCT	,	_	54	punct	_	_
56	ir	ir	NOUN	NN	Number=Sing	39	conj	_	_
57	+	+	SYM	SYM	_	58	cc	_	_
58	regular	regular	ADJ	JJ	Degree=Pos	56	conj	_	_
59	=	=	PUNCT	,	_	60	punct	_	_
60	irregular	irregular	NOUN	NN	Number=Sing	56	conj	_	_
61	,	,	PUNCT	,	_	62	punct	_	_
62	im	im	NOUN	NN	Number=Sing	56	conj	_	_
63	+	+	SYM	SYM	_	64	cc	_	_
64	mature	mature	ADJ	JJ	Degree=Pos	62	amod	_	_
65	=	=	PUNCT	,	_	62	punct	_	_
66	immature	immature	NOUN	NN	Number=Sing	62	conj	_	_
67	.	.	PUNCT	.	_	4	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **explain** *speech: assert* | present | that one rule | the famous double letters |  |  |  | dis *obl* | tree rules |
| 2 | **appear** | infinitive | that one rule *not said here* |  |  |  |  |  | vn seem-109-1-1-1 «NP V S\_INF»: agent=Theme clause=Attribute |
| 3 | **disappear** | infinitive | that one rule *not said here* | one |  |  |  |  | tree rules |
| 4 | **appear** *in a quote* | present | that one rule *not said here* |  |  |  |  |  | vn seem-109-1-1-1 «NP V S\_INF»: agent=Theme clause=Attribute |
| 5 | **have** | present | that one rule *not said here* | none |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent none=Patient |
| 6 | **misspell** | infinitive | that one rule *not said here* | both s |  |  |  | + legal | 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.

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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:english:012-prefixes-un-dis-mis-re-pre-in-im-il-ir.lesson:3`.

**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): R6-punct-agree ×1, 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/).

<!-- /div -->

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