ページ1:

「~しなければならない
have to
have to~
+ 動詞の原形~
I. You at
(主語が3人称の時>
He has to
J
~する必要はない」「~しなくてよい」
don't have
to + 動詞の原形~、
<3人称)
doesn't
を使う。
で表す。
で表す。
You have to
speak
English in this class.
Toshi has to speak
English in the class.
You don't have to
speak
good English.
Yuki doesn't have to speak
English.
<疑問文>
Doを主語の前におく。
Do
we have
to speak
<3人称>
Japanese?
Yes, you do.
'
No,
you
don't.
Does を主語の前におく。
Does Beth have to speak Japanese?
Yes
she does.
No, she doesn't.
doesn't のあとは have to !!

ページ2:

「~しなければならない」
must+動詞の原形~
TN
~してはならない」
must
must not + 動詞の原形~.
You must help him.
3人称でも動詞は原形
You must not help him.
<疑問文>
mustを主語の前におく!
Must
I help him?
Yes,
you must.
No, you
don't have to.
気をつける!