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e Key Points 義務・禁止・推量(必要)
= Point 1 「~しなければならない」
must
01 must buy two plane tickets.
You must take off
Your
脱ぐ
shoes here.
Mary must go out of the room right now.
出ていく
Point 2 「~してはいけない」→「しなくても良い」ではない
must not
You must not speak Japanese in class.
Don't speak Japanese in class.
We must jump in to the pool.
とぶ必要がない。
We don't have to jump in to the pool.=私たちはプールでとばなくても良い
mobile phones at school.
You mustn't
use
Point3 「~に違いない」
must be
He must be a doctor.
must not =
That green car must be Tom's.
do not
That man in a hat must be rich
帽子を身につけている
お金持ち