to不定詞(to-infinitive)とは「to do」の形で「～すること」「～するための」「～するために」などの意味を表す準動詞です。
高校レベルのto不定詞に関する様々な項目をこのページにまとめました。
解説・問題は随時追加していきます。
中学レベルの不定詞についてはこちら
◆解説
不定詞の名詞的用法
不定詞の形容詞的用法
不定詞の副詞的用法
原形不定詞
enough to do
too ～ to do
It is ～ for/of 人 to do.
seem to do
so as to do
in order to do
be動詞＋to do
◆問題
●基本的な用法
I [join / to / want] the brass band.
Her future plan [ a kindergarten teacher / is / be / to ].
[ to / it / important / eat / is ] breakfast every morning.
She [ answer / found / to / difficult / it ] the math question.
My grandmother is very old. She wants [ go / someone / to ] shopping for her.
There are [ visit / to / places / a lot of ] in Hokkaido.
All children have [ to / receive / the right ] an education.
She went to the library (何冊か本を借りるために).
She was excited (路上で級友に会って).
Lisa arrived at the station (電車がすでに出てしまったとわかる)
●seem to do
Many Japanese people seem [ ] interested in blood types.
She seems [ ] a new smartphone.
She [got / seems / have / to] full marks in the last math test.
●形式主語
It is natural [cry / for / to / babies] for milk.
It is very important [protect / for / to / us] the earth's environment.
It is dangerous [use / for / to / you] a cellphone when you are walking.
It was kind [lend / of / to / you] me your umbrella.
It is easy [solve / for / to / her] math problems.
●ＳＶＯＣ
I ( ) my grandparents ( ) ( ) a long life.
Our homeroom teacher ( ) ( ) ( ) do our best.
My parents will not ( ) ( ) ( ) have a part-time job.
Since the boy's room was too messy, his mother ( ) him ( ) his room.
My father does not ( ) me ( ) out late at night.
I felt happy when I ( ) a young girl ( ) her train seat to an old lady.
Did you ( ) someone ( ) on the door?
My brother [look for / advised / to / me] it on the Internet.
He [his computer / let / use / me] that afternoon.
●疑問詞＋不定詞
My father does not know ( ) ( ) ( ) his smartphone.
Please tell me ( ) ( ) ( ) for my father's birthday.
Have you decided ( ) ( ) ( ) on your summer vacation?
I didn't [look up / know / to / how] the meaning of the word.
●熟語・構文
I am ( ) busy ( ) ( ) you this week.
I decided ( ) ( ) ( ) out because it was raining hard.
Ken was strong ( ) ( ) ( ) the rock.
They ( ) ( ) ( ) married in June.
She was [help / kind / to / enough] me with my math homework.
江間淳の書籍はこちら
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
20年以上の実績。全学年、英・数・理をはじめ全教科対応
最高級の指導を提供します！メール添削も好評です！
プロ家庭教師の江間です。 ＡＥ個別学習室(えまじゅく)
http://www.a-ema.com/k/ http://www.a-ema.com/j/
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
ラベル：英語
