動画で学ぶ英語：フレーズとレッスン

Boys vs girls: what does just in case mean? | English from movies

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10行中1行目 0:00 The 5,000 Fingers of Dr. T.

I'll it just in case.

一緒に読む一行ずつ聞くだけ

行を選択すると、もう一度聞けます。単語をタップすると意味が表示されます。下線が引かれた単語は、この動画のキーワードです。

The 5,000 Fingers of Dr. T. I'll it just in case.
Tutor Say you you . It , so don't use it for a .
Before We Go But you .
Tutor Use you is , to say it . Don't use it as an to a yes or no .
Behind Enemy Lines It's to be to be in a .
Tutor Use to or a . of . It can a for .
Tutor .
Tutor Use a now can a . It's a , so don't the .
Tutor I'd it and not it.
Tutor Use to why you . It you a bag.

まず押さえたいこと

Boys vs girls: packing a work bag

"Just in case" means you do something now because a problem might happen later. You can say "I'll bring it just in case." when you pack something you probably won't need. Two other useful lines are "But you never know." and "It's better to be prepared."

この動画のキーワード

単語をタップすると意味が表示されます。下線が引かれた単語は、この動画のキーワードです。

表現ごとの解説

I'll bring it just in case. Casual and light

Say this when you take something extra that you might need. It sounds relaxed, so don't use it for a serious safety warning.

“I'll bring it just in case.”

使用作品：The 5,000 Fingers of Dr. T. (1953)
But you never know. Friendly, with a shrug

Use this after you admit something is unlikely, to say it could still happen. Don't use it alone as an answer to a direct yes or no question.

“But you never know.”

使用作品：Before We Go (2014)
It's better to be prepared. Serious, sensible advice

Use this to give calm advice or explain a careful choice. Prepared means ready ahead of time. It can sound a little serious for very small things.

“It's better to be prepared than to be caught sleeping in a field.”

使用作品：Behind Enemy Lines (2001)
Better safe than sorry. Light, common advice

Use this when a small effort now can stop a bigger problem later. It's a fixed saying, so don't change the words.

“Better safe than sorry.”
I'd rather have it and not need it. Practical, a bit playful

Use this to explain why you carry something extra. It works well when someone teases you about a heavy bag.

“I'd rather have it and not need it.”
I'm packing a spare, just in case. Neutral and everyday

Use this when you add a second item, like a battery, a pen or a charger. A spare is an extra one of the same thing.

“I'm packing a spare, just in case.”

よくある間違い

惜しい表現 ~~I'll bring it in case.~~

より適切な表現 I'll bring it just in case.

At the end of a sentence with nothing after it, English uses just in case. In case alone usually needs a clause after it, such as in case it rains.
惜しい表現 ~~Take an umbrella in case it will rain.~~

より適切な表現 Take an umbrella in case it rains.

After in case, use the present simple to talk about a possible future event. Will sounds wrong here.
惜しい表現 ~~Bring a charger in case of your phone dies.~~

より適切な表現 Bring a charger in case your phone dies.

Use in case of before a noun, as in in case of fire. Use in case before a subject and verb, as in in case your phone dies.