Fragen über die Beispielsätze mit, und die Definition und Benutzung von "Holder"

A: Happens to = ironically, funnily coincidentally.
When ‘happens to’ is added to a sentence it shows that there is a joke or something funny or coincidental.
Key holder in a key shape is funny.
Hope that helps~

A: It has several meanings. One is something that holds something or in which something is placed - e.g. a phone holder is where you put your phone when not in use. It can also mean the person or team that is the current champion of something e.g. Barcelona are the current holders of the Spanish Super Cup.

A: https://www.google.com/imgres?imgurl=https%3A%2F%2Fimages-na.ssl-images-amazon.com%2Fimages%2FI%2F81iqHH0wyJL._SX466_.jpg&imgrefurl=https%3A%2F%2Fwww.amazon.com%2FHanging-Kitchen-Ceiling-Cookware-Storage%2Fdp%2FB00PDMFBAO&docid=_pngik9OL0B_HM&tbnid=00IlnGK9rMQ5pM%3A&vet=1&source=sh%2Fx%2Fim

A: i use a pencil holder to hold up all my pens and pencils.

A: The "holder" of something is the one who's responsibility is to keep it safe.

The "bearer" of something is the one who's responsibility is to carry something.

So, in case of a holder, even if the thing is yours and he is holding it for you, it is not his responsibility to deliver it to you.

In case of the bearer, if the thing is yours, then he should carry it and deliver it to you.

"Holder of the keys", he might lock them up in safe.
"The bearer of the keys", he carries them with him on his person.

A: The person who owns the ticket. "Holder" is often used to mean "a person who has something", like shareholder (a person who owns shares in a business) or record-holder (someone who has a world record).

A: Holder.

A: × I put a key holder on my bag.
✓ I put a keychain on my bag.

キーホルダー = keychain （和製英語かもしれません）

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