de

Particle

1. at; in

キャシーがパーティーで なん ていたか おぼえていますか。
kyashiiga pātiide nanio kite itaka oboete imasuka.
Do you remember what Kathy had on at the party?
Particle

2. at; when

かれらは つぎ日曜 にちよう かげつ当地 とうち滞在 たいざいしていることになる。
karerawa tsugino nichiyōbide nikagetsu tōchini taizai shite iru kotoni naru.
They will have been staying here for two months next Sunday.
Particle

3. by; with

りつ たい いちでレッズが つだろう。
kakeritsu ni taiichide rezzuga katsudarō.
The odds are two-to-one that the Reds win.
Conjunction

4. so; therefore; (and) then; accordingly

Colloquial
Related to それで
、電話 でんわしてみたらしいんだけど、その電話 でんわ さき相手 あいてってのが問題 もんだいだったのよ。
de denwa shite mitara shiindakedo sono denwasakino aitette noga mondaidattanoyo.
And so it seems she tried phoning but it's who was on the other end of that phone that was the problem.
Conjunction

5. by the way; incidentally; now then; well

Colloquial
Related to ところで