Q: Fasten on とはどういう意味ですか?
A: If you fasten on something, you attach it.

Example: I fastened on the button to my coat with some yellow thread.


Q: Fasten を使った例文を教えて下さい。
A: Please fasten your seatbelt before the plane takes off
Make sure you fasten your seatbelt before putting the car in drive


Q: Fasten your seat belt while seated.
Fasten your seat belt while seating. はどう違いますか?
A: Fasten your seat belt while seated. This is the only position you can be in when fastening your seat belt. After you’ve sat down.

Fasten your seat belt while sitting down. This is not physically possible to do.
Q: Fasten と Buckle はどう違いますか?
A: They're used interchangeably, I guess "fasten" is literally more like "secure".


Q: Fasten the lid? Close the lid? は 英語 (アメリカ) で何と言いますか?
A: put the lid on


Q: Fasten seatbeltの発音を音声で教えてください。
A: QAの全文をご確認ください
Q: Fasten your seatbelt.
Unfasten your seatbelt.
Buckle your seatbelt.
Unbuckle your seatbelt.
Put on your seatbelt.
Take off your seatbelt.

Are there any incorrect sentences ? Thank you.
A: nope you’re good !
Q: Which one is more commonly used fasten or do up?
# Fasten ? do up ? a button?
A: Button can be a verb so "can you button me up" "he buttoned up his jacket"
Q: Fasten your seat belt or else you will be arrested by the police. It's against the rules. この表現は自然ですか?
A: Grammatically perfect, however I would say "Fasten your seat belt or you'll be arrested. It's against the law."

It's implied that the police are doing the arresting.
Q: Fasten the Velcro.
Take off the Velcro. この表現は自然ですか?
A: This is the strap of the shoe so I would say to my daughter "fix your strap" if it was unfastened. You can say "fasten the strap" and "unfasten the strap"