いけない
Meanings
Expression
I-adjective
1. bad; wrong; naughty
2. must not (do, be); should not; ought not to (after the -te form of a verb or adjective)
3. useless; no good; bad
4. hopeless; beyond hope
5. unfortunate; a shame; a pity (used to express sympathy)
6. unable to drink (alcohol)
7. so as not to ...; so that ... (won't); in case ...; for fear that ...; lest ... (as ...（すると／しては）～（から／ので）)
Examples711
道に迷う
Take a map with you in case you get lost.
彼
I really like him, but not his circle of friends.
この
You mustn't format this floppy disk.
「風邪気味
"I've a touch of a cold." "That's too bad."
外
You can't go out.
君
You are not to leave this room.