英検2級英作文は難しい単語が必要？｜beneficial→usefulなど簡単な英語へ言い換える独自36問

2026年11月3日

慶英会塾長｜慶應義塾大学卒・英検1級
中高一貫校の学校英語・NEW TREASURE・英検対策を専門とするオンライン個別指導塾です。塾長紹介

最大1か月完全無料体験・学習相談（Web）｜公式LINEで相談｜料金・無料体験の条件

慶英会塾長｜慶應義塾大学卒・英検1級
中高一貫校の学校英語・NEW TREASURE・英検対策を専門とするオンライン個別指導塾です。塾長紹介

英検2級英作文では、難しい単語を無理に使うより、知っている単語で正確に書く方が答案を安定させやすくなります。例えば beneficial が出てこなくても useful、purchase が出てこなくても buy、approximately が出てこなくても about と言い換えられます。この記事では「難語を簡単な英語へ変える」独自36問と模範3題で練習します。

結論｜「知っている・間違えない・説明できる」語彙を選ぶ

英作文は単語帳の知識を披露する場ではありません。自分の主張を明確にし、理由を説明するために、正確に使える語彙を選びます。

独自36問｜難しい語を簡単な英語へ

beneficial → useful
purchase → buy
assist → help
participate → join / take part
approximately → about
numerous → many
additional → more
communicate → talk with
individuals → people
obtain information → get information
reduce expenses → save money
provide support → help
increase → make … higher / get more
decrease → make … lower / get less
have access to → can use / can get
make a decision → decide
in addition → also
therefore → so
however → but
for this reason → so / because of this
in my opinion → I think
one advantage is → one good point is
one disadvantage is → one problem is
be able to → can
be required to → have to / must
consume less energy → use less energy
improve communication skills → communicate better
make an effort → try
give assistance → help
make a choice → choose
is necessary → is needed
is effective → works well
is convenient → is easy to use
is difficult → is hard
is important → matters
最終確認 → 「簡単にした結果、意味が変わっていないか」を確認する。

簡単にしすぎて意味を変えない

元の表現	言い換え	注意
may help	can help	可能性の幅を確認
should	must	義務が強くなる
many	all	範囲が広がる
often	always	頻度が強くなる

模範3題

第1題

Topic: Should schools offer more community activities?

Model: I think they should. First, these activities can be useful because students can learn about local problems. Second, students can meet people of different ages. For example, they can help at local events after school.

第2題

Topic: Should teenagers use more public transportation?

Model: Yes, I think they should. Public transportation can be convenient for students who live far from school or libraries. It can also reduce the need for parents to drive them. For example, students can take buses to activities after school.

第3題

Topic: Should students read more books?

Model: I think they should. Reading can help students learn new words and ideas. Books can also help them understand different viewpoints. For example, students may learn about people from different backgrounds.