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Table of Contents

#	JLPT N5 Grammar Lessons	Meaning	Page
1	ちゃいけない・じゃいけない (cha ikenai / ja ikenai)	must not do (spoken Japanese)	4
2	だ・です (da / desu)	to be (am, is, are, were, used to)	7
3	だけ (dake)	only; just; as much as	10
4	だろう (darou)	I think; it seems; probably; right?	13
5	で (de)	in; at; on; by; with; via	16
6	でも (demo)	but; however	19
7	でしょう (deshou)	I think; it seems; probably; right?	21
8	どんな (donna)	what kind of; what sort of	24
9	どうして (doushite)	why; for what reason; how	26
10	どうやって (douyatte)	how; in what way; by what means	28
11	が (ga)	subject marker; however; but	30
12	があります (ga arimasu)	there is; is (non-living things)	33
13	がほしい (ga hoshii)	to want something	36
14	がいます (ga imasu)	there is; to be; is (living things)	38
15	ほうがいい (hou ga ii)	had better; it’d be better to; should~	41
16	い-adjectives (i-adjectives)	i-adjectives	43
17	一番 (ichiban)	the most; the best	46
18	一緒に (issho ni)	together	48
19	いつも (itsumo)	always; usually; habitually	50
20	じゃない・ではない (janai / dewa nai)	to not be (am not; is not; are not)	52
21	か (ka)	question particle	56
22	か〜か (ka ~ ka)	or	58
23	から (kara)	because; since; from	60
24	方 (kata)	the way of doing something; how to do	64
25	けど (kedo)	but; however; although	66
26	けれども (keredo mo)	but; however; although	68
27	まだ (mada)	still; not yet	70
28	まだ〜ていません (mada ~te imasen)	have not yet	72
29	まで (made)	until ~; as far as ~; to (an extent); even ~	74
30	前に (mae ni)	before ~; in front of ~	76
31	ませんか (masen ka)	would you; do you want to; shall we~	78
32	ましょう (mashou)	let’s ~; shall we ~	80
33	ましょうか (mashouka)	shall I ~; used to offer help to the listener	82
34	も (mo)	too; also; as well	84
35	もう (mou)	already; anymore; again; other	86
36	な-adjectives (na-adjectives)	na-adjectives	89
37	なあ (naa)	sentence ending particle; confirmation; admiration, etc	91
38	ないで (naide)	without doing ~; To do [B] without doing [A]	93
39	ないでください (naide kudasai)	please don’t do	95
40	なくていい (naku temo ii)	don’t have to	97
41	なくちゃ (nakucha)	must do; need to; gotta do	99
42	なくてはいけない (nakute wa ikenai)	must do; need to do	102
43	なくてはならない (nakute wa naranai)	must do; need to do	104
44	なる (naru)	to become	106
45	んです (n desu)	to explain something; show emphasis	109
46	ね (ne)	isn’t it? right? eh?	111
47	に (ni)	destination particle; in; at; on; to	113
48	にいく (ni iku)	go to do	116
49	にする (ni suru)	to decide on	118
50	に/へ (ni/e)	to (indicates direction / destination)	120
51	の (no)	possessive particle	122
52	のです (no desu)	to explain something; show emphasis	124
53	のが下手 (no ga heta)	to be bad at doing something	127
54	のが上手 (no ga jouzu)	to be good at	129
55	のが好き (no ga suki)	to like doing something	131
56	の中で[A]が一番 (no naka de [A] ga ichiban)	out of this group, [A] is best	133
57	ので (node)	because of; given that; since	135
58	を (o / wo)	object marker particle	137
59	をください (o kudasai)	please give me~	139
60	しかし (shikashi)	but; however	141
61	すぎる (sugiru)	too much	143
62	たことがある (ta koto ga aru)	to have done something before	146
63	たい (tai)	want to do something	148
64	たり〜たり (tari ~ tari)	do such things as A and B	151
65	てある (te aru)	is/has been done (resulting state)	153
66	ている (te iru)	ongoing action or current state	156
67	てから (te kara)	after doing ~	162
68	てください (te kudasai)	please do	164
69	てはいけない (te wa ikenai)	must not; may not; cannot	166
70	てもいいです (te mo ii desu)	is OK to…; is alright to…? may I…?	168
71	と (to)	and; with; as; connecting particle	170
72	とき (toki)	when; at this time	172
73	とても (totemo)	very; awfully; exceedingly	174
74	つもり (tsumori)	plan to ~; intend to ~	176
75	は (wa)	topic marker	178
76	は〜より〜です (wa ~yori… desu)	[A] is more than [B]	180
77	はどうか (wa dou desu ka)	how about; how is	182
78	や (ya)	and; or; connecting particle	184
79	よ (yo)	you know; emphasis (ending particle)	186
80	より〜ほうが (yori ~hou ga)	[A] is more than [B]	189

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ちゃいけない・じゃいけない

Meaning
must not do (spoken Japanese)

How To Use
| Verbて | ちゃだめ |
| :— | :— |
| | ちゃいけない |
| | じゃだめ |
| | じゃいけません |
| Verbで | じゃだめ |
| | じゃいけない |
| | じゃいけません |

Learn Japanese grammar: ちゃいけない (cha ikenai) / じゃいけない (ja ikenai) / じゃだめ (ja dame). Meaning: must not; may not; cannot (spoken Japanese).

This grammar is a more casual way to say we should not do / may not do something. To be more formal, you can use てはいけない (te wa ikenai).

Which to use: ちゃ VS じゃ

• Use the verb’s て form, but then remove the て
  • たべる -> たべて -> たべちゃ
  • “taberu” -> “tabete” -> “tabe cha”
• If the て form is で, then ちゃ turns to じゃ
  • のむ -> のんで -> のんじゃ
  • “nomu” -> “nonde” -> “nonja”

3 Main Ending Patterns

• ・だめ (dame) = standard, casual
• ・いけない (ikenai) = standard, casual
• ・いけません (ikemasen) = same, but more formal

Example Sentences

1. 寝る前にスマホを見ちゃだめよ。
   neru mae ni sumaho o micha dame yo.
   You shouldn’t look at your smartphone before going to bed.
2. ここはきけんなので、入っちゃだめだ。
   koko wa kiken nano de, haiccha dame da yo.
   This area is dangerous, so you’re not allowed to enter.
3. やっちゃいけないことをやっちゃった。
   yaccha ikenai koto o yacchatta.
   I did something I shouldn’t have…
4. 自信をなくしちゃいけません！
   jishin o naku shicha ikemasen!
   You mustn’t lose confidence!
5. そんなに授業をさぼっちゃだめよ。
   sonna ni jugyou o saboccha dame yo.
   You shouldn’t skip class so much.
6. 彼を信用しちゃいけない。
   kare o shinyou shicha ikenai.
   We cannot trust him.
7. 赤信号をむししちゃいけません！
   aka shingou o mushi shicha ikemasen.
   You must not ignore red lights!