以前は英語で
previously

英語の定義

previously
1. adv. At an earlier time.

before
1. prep. Earlier than (in time).
I want this done before Monday.
2. prep. In front of in space.
He stood before me.
We sat before the fire to warm ourselves.
3. prep. In the presence of.
He performed before the troops in North Africa.
He spoke before a joint session of Congress.
4. prep. Under consideration, judgment, authority of (someone).
The case laid before the panel aroused nothing but ridicule.
5. prep. In store for, in the future of (someone).
6. prep. In front of, according to a formal system of ordering items.
In alphabetical order, "cat" comes before "dog", "canine" before feline".
7. prep. At a higher or greater position than, in a ranking.
An entrepreneur puts market share and profit before quality, an amateur intrinsic qualities before economical considerations.
8. adv. At an earlier time.
I've never done this before.
9. adv. In advance.
10. adv. At the front end.
11. conj. in advance of the time when
12. conj. (informal) rather or sooner than

once
1. adv. (frequency) One and only one time.
I have only once eaten pizza.
2. adv. (temporal location) Formerly; during some period in the past.
He was once the most handsome man around. I once had a bicycle just like that one.
Wang notes that flowers have rooted and grow in the area once covered with ice.
3. adv. (mathematics) Multiplied by one: indicating that a number is multiplied by one.
Once three is three.
4. adv. As soon as.
5. adv. (obsolete) At a future time.
6. conj. As soon as; when; after.
We'll get a move on once we find the damn car keys!
Once you have obtained the elven bow, return to the troll bridge and trade it for the sleeping potion.
Once he is married, he will be able to claim the inheritance.