英作文で使える表現・例・フレーズ70選｜大学受験・高校・英検自由英作文

It costs too much.

costは「費用がかかる」という動詞です。具体的な金額を続けるならIt costs 5,000 yen.のように書けます。例文
Introducing the system would be difficult because it costs too much.

It takes too much time.

時間がかかる場合はtakeを使います。人を主語にして時間を費やすならspendを使います。例文
Commuting by car takes too much time in heavy traffic.

It can save time and money.

save time and moneyは幅広いテーマで理由として使える定番表現です。例文
Online services can save time and money.

It is difficult for A to do.

It is＋形容詞＋for A＋to doの形です。Aにはpeopleやstudentsなどを入れます。例文
It is difficult for elderly people to use some digital services.

A does not have enough time to do.

enough timeの後ろにto不定詞を続け、何をする時間がないのかを示します。例文
Many parents do not have enough time to cook every day.

There are not enough A.

数えられる複数名詞にはThere are not enoughを使います。不可算名詞ならThere is not enough。例文
There are not enough doctors in some rural areas.

It helps A (to) do.

help＋人＋動詞の原形が基本です。toはあってもなくても構いません。例文
Group work helps students develop communication skills.

It allows A to do.

allow＋人＋to doの語順です。人を入れずallow to doとはできません。例文
The internet allows people to work from home.

It makes it easier for A to do.

make it easier for A to doで、環境や制度による利便性を説明できます。例文
Clear signs make it easier for tourists to find their way.

A can learn how to do.

how to doで「〜する方法」。活動や教育の利点を書くときに便利です。例文
Through volunteering, students can learn how to work with others.

A has more opportunities to do.

opportunityの後ろはto不定詞を使います。more opportunitiesで機会の増加を表せます。例文
Students have more opportunities to use English outside the classroom.

A is more likely to do.

be likely to doで「〜する可能性が高い」。比較級moreを加えて変化を示せます。例文
People who exercise regularly are more likely to stay healthy.

A may not be able to do.

助動詞を重ねてmay not canとはしません。may not be able toを使います。例文
Low-income families may not be able to afford private lessons.

It is useful for people who …

人を説明する関係代名詞whoを使い、どんな人に役立つかを限定できます。例文
This service is useful for people who live far from hospitals.

This is especially important for A.

especiallyを使うと、影響を受ける対象を絞って論じられます。例文
This is especially important for children and elderly people.

It can reduce the burden on A.

burden on Aで「Aにかかる負担」。家族・教員・医療従事者などに応用できます。例文
The program can reduce the burden on working parents.

A cannot afford to do.

cannot afford to doで「経済的・時間的余裕がなく〜できない」を表します。例文
Some students cannot afford to study abroad.

A does not have to do.

does not have toは「必要がない」。must notは「してはいけない」なので意味が異なります。例文
Users do not have to travel to the city office.

It may have a negative effect on A.

effectは名詞で前置詞はon。断定を避けたい場合はmayが便利です。例文
Too much screen time may have a negative effect on sleep.

It may widen the gap between A and B.

widen the gap between A and Bで、教育・地域・所得などの格差を論じられます。例文
The policy may widen the gap between urban and rural areas.

I believe that …

自分の立場を明確に示す基本表現。thatの後ろには主語＋動詞を置きます。例文
I believe that schools should teach financial literacy.

In my opinion, …

文頭で意見を示す定番表現です。後ろには完全な文を続けます。例文
In my opinion, public transportation should be improved.

From my point of view, …

少し丁寧に自分の見方を示せます。例文
From my point of view, volunteering is a valuable experience.

I agree with the idea that …

agreeは動詞。人・意見に賛成する場合はagree withを使います。例文
I agree with the idea that university students should study abroad.

I do not agree that …

反対を穏やかに示す形。強く断定しすぎず論を始められます。例文
I do not agree that technology always improves our lives.

There is no denying that …

広く認められる事実や傾向を導入する表現です。例文
There is no denying that smartphones have changed communication.

It is debatable whether …

賛否のある論点を慎重に提示できます。whetherの後ろは主語＋動詞。例文
It is debatable whether online classes can replace face-to-face lessons.

The main reason is that …

reason is thatが基本です。reasonとbecauseの重複は入試では避けるのが安全。例文
The main reason is that young people need practical experience.

One reason is that …

複数の理由のうち一つを挙げるときに便利です。例文
One reason is that bicycles produce no emissions.

This is because …

直前の主張の理由を一文で補います。例文
Many people prefer remote work. This is because it saves commuting time.

Since …

Since＋主語＋動詞で、理由を簡潔に表せます。時を表すsinceとの区別に注意。例文
Since resources are limited, we must use them wisely.

Because of …

because ofの後ろには名詞・代名詞・動名詞を置きます。例文
Because of population aging, the demand for care workers is rising.

Given the fact that …

既知の事実を根拠に判断するときに使えます。例文
Given the fact that many students work part-time, flexibility is necessary.

This can be explained by …

原因や背景を客観的に述べる受動態の表現です。例文
This can be explained by differences in access to education.

First of all, …

最初の理由や論点を示します。Firstでも十分です。例文
First of all, the policy would reduce waste.

Second, …

Firstに対応させて次の理由を示します。形式は文中で統一しましょう。例文
Second, it would create new jobs.

Furthermore, …

同方向の根拠を追加する、ややフォーマルな接続語です。例文
Furthermore, the program would benefit local businesses.

Moreover, …

前の内容に重要な点を付け加えます。多用は避けましょう。例文
Moreover, regular exercise can improve mental health.

In addition, …

文頭で情報や理由を追加する定番表現です。例文
In addition, libraries provide safe places for children.

Not only A but also B

AとBは文法上同じ形にそろえるのが重要です。例文
The project will benefit not only students but also teachers.

In addition to …

後ろには名詞または動名詞を置きます。例文
In addition to reducing costs, the change will save time.

For example, …

主張を支える具体例を示す最重要表現です。例文
For example, schools can invite local professionals to speak.

such as …

複数の例を名詞で挙げるときに使います。通常、完全な文は続けません。例文
Renewable energy sources such as solar and wind power are becoming cheaper.

More specifically, …

前の内容をより限定して詳しく説明します。例文
More specifically, cities should add buses during rush hour.

A good example of this is …

直前の一般論に対応する例を明示できます。例文
A good example of this is the spread of cashless payment.

In other words, …

同じ内容を分かりやすく言い直します。新しい根拠の追加には使いません。例文
In other words, convenience should not come at the cost of privacy.

This means that …

事実や例から導ける意味を説明します。例文
This means that small actions can have a large impact.

As can be seen from …

データ・例・結果から読み取れることを述べます。例文
As can be seen from this example, early support is effective.

However, …

前文と対照的な内容を示します。文頭では通常カンマを置きます。例文
However, the plan may be too expensive for small towns.

On the other hand, …

対になる別の側面を示します。単なる追加には使いません。例文
On the other hand, online learning offers greater flexibility.

While …, …

while＋主語＋動詞で二つの側面を対比できます。例文
While technology is useful, it can also cause stress.

Although …, …

Although節と主節をつなぎます。butとの重複は避けます。例文
Although the idea sounds attractive, it has several risks.

Despite …

後ろには名詞・代名詞・動名詞を置きます。例文
Despite its benefits, the system is not widely used.

It is true that …, but …

相手側の論点を一度認めてから自分の主張を示す譲歩表現です。例文
It is true that cars are convenient, but they cause pollution.

Some people argue that …

反対意見や一般的な主張を公平に紹介できます。例文
Some people argue that university education should be free.

Even if …, …

仮定を認めても結論が変わらないことを示します。例文
Even if the change is difficult, it is worth trying.

As a result, …

原因の後に結果を示します。前後の因果関係が明確なときに使います。例文
As a result, fewer people may choose to drive.

Therefore, …

根拠から論理的な結論を導くフォーマルな接続語です。例文
Therefore, governments should invest in prevention.

For this reason, …

直前に示した理由を受けて判断や提案を述べます。例文
For this reason, media literacy should be taught at school.

This can lead to …

lead toの後ろには名詞・動名詞を置きます。例文
Regular discussion can lead to better decisions.

enable A to do

人・物Aが〜できるようにする、という因果を簡潔に表せます。例文
Digital tools enable students to learn at their own pace.

in order to …

目的を明確にします。後ろには動詞の原形を置きます。例文
We need clear rules in order to protect personal data.

to prevent A from doing

prevent A from doingで「Aが〜するのを防ぐ」。例文
Cities should improve drainage to prevent streets from flooding.

should …

提案の基本形。shouldの後ろは動詞の原形です。例文
Schools should give students more opportunities to speak English.

It is important to …

結論や提案の重要性を簡潔に強調できます。例文
It is important to listen to different opinions.

Governments / Schools should focus on …

focus onの後ろには名詞・動名詞を置きます。例文
Governments should focus on supporting local communities.

In conclusion, …

最終段落で要点をまとめます。ここで新しい論点を出さないのが原則です。例文
In conclusion, the benefits of the policy outweigh its disadvantages.

For the reasons mentioned above, …

本文で述べた複数の理由を受けて最終判断を示します。例文
For the reasons mentioned above, I support the proposal.

In the long run, …

将来の影響を含めて結論を述べるときに便利です。例文
In the long run, investing in education benefits society as a whole.

The advantages of A outweigh the disadvantages.

賛否を比較した後の結論に使えます。outweighは他動詞です。例文
The advantages of studying abroad outweigh the disadvantages.