読者のみなさんから頂いた英作文を添削するシリーズ。今回は校則についての英作文です。２級受験予定のmayumiさんが書いてくださったのを添削させていただきます。例題トピックはこちら↓

TOPIC
Do you think school rules are necessary?
POINTS
-responsibility
-safety
-freedom
-creativity
語数：２級80-100語

校則は必要？mayumiさんの英作文

I agree with the opinion that school rules are necessary. I have two reasons why I think so.
First of all, school is the place to study or exercise with their fellow students. So, they should not be distracted by make-up and fashions but also concentrate their attention on their work.
Secondly, the existence of school rules is prevent students from dangerous situations. For example, riding a motorcycle is strictly dangerous for high school students. Because they are not used to ride them.
For these reasons, I think that school rules are neccesary for students.
(95 words)

mayumiさん、ありがとうございます。賛成の立場で書いてくださいました。

理由１：学生が学業に集中できるように
理由２：危険予防

内容と流れはＯＫです。文法の小さな間違いがありましたので、下に解説します。

接続詞 because の使い方に注意
be used to -ing,と used to do
- used to doは過去のことを振り返る表現
添削例
予想点数

接続詞 because の使い方に注意

becauseの使い方が少し気になりました。

3パラグラフ目の最後（下から３行目）に、バイク通学禁止の理由として

Because they are not used to ride them.

の一文がありますが、作文の中でbecauseをこのよう単独で使うのは間違いです。

becauseは接続詞なので、文と文をつなぐ形で使わなければなりません。（会話ならbecause単独もOKですが。）以下のように修正しましょう。

× For example, riding a motorcycle is strictly dangerous for high school students. Because they are not used to ride them.
↓
〇 For example, riding a motorcycle is strictly dangerous for high school students because they are not used to ride them.

be used to -ing,と used to do

もう1点残念なミスは、 be used to -ingとused toです。

Because they are not used to ride them.

この部分は、「学生はバイクに乗り慣れていないから」という意味ですが、その場合はtoの後ろが-ingになります。

× they are not used to ride them.
↓
〇 they are not used to riding them.

used to doは過去のことを振り返る表現

used toとbe used toは形が似ているので、よく間違う文法項目のひとつです。

I used to be a popular singer.　かつて人気歌手だった（が今は違う）
I didn’t use to eat vegetables. 　昔は野菜は食べなかった（が今は違う）

be used to -ingとused to do は形が似ているので間違いやすいですね。みんなが間違いやすいところは目立つので、本番で正しく書けるように練習しておきましょう。

添削例

I agree with the opinion that school rules are necessary. I have two reasons why I think so.

First of all, school is the place (for students ) to study or exercise with their fellow students. So, they should not be distracted by make-up and fashions but also concentrate their attention on their work.

Secondly, the existence of school rules is prevent students from dangerous situations. For example, riding a motorcycle is strictly dangerous for high school students~~. Because~~ because they are not used to ~~ride~~ riding them.

For these reasons, I think that school rules are ~~neccesary~~ necessary for students.