then

• adv.それから；それから；こうして；それから；その上
• その時
• conj.
• n. （それから）人の名前；（ドイツ語で）ターン

古英語のthanne, after this, thenから、原ゲルマン語*thana, thatから、PIE*toから、指示代名詞、語源的にはthis, thatと同じ。

then

then: [OE] Then was formed from the ancient demonstrative base *ta-, which also underlies English that and there. Its West Germanic relatives include German dann and Dutch dan. It is ultimately the same word as than.
=> than, the, there

then (adv.)

adverb of time, Old English tanne, t?nne, tonne, from Proto-Germanic *thana- (cognates: Old Frisian thenne, Old Saxon thanna, Dutch dan, Old High German danne, German dann), from PIE demonstrative pronoun root *to- (see the).

As a conjunction, "in that case, therefore," in Old English. As an adjective, "being at that time," from 1580s. As a noun from early 14c. For further sense development, see than. Similar evolutions in other Germanic languages; Dutch uses dan in both senses, but German has dann (adv.) "then," denn (conj.) "than." Now and then "at various times" is attested from 1550s; earlier then and then (c. 1200).

1. You have to do everything you can.You have to work your hardest.And if you do，if you stay positive， then you have a shot at a silver lining.

あなたは全力を尽くして、最大限に努力しなければなりません。もしあなたがそうして楽観的であれば、あなたは黒い雲の背後にある幸福線を見ることができます。

映画『黒い雲の陰の幸福線』

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2.It was just then that I chanced to look round.

ちょうどその時、私はちょうど下の周りを見回した。

3.He then held the man in an armlock until police arrived.

そして彼はその男の腕を逆さまにねじって、警察が駆けつけるまで動けないようにした。

4. Then something seemed to snap in me.I couldn 't endure any more.

この時、私の心の中に何かが突然折れたような気がして、私はもう我慢できません。

5. "His memory must be completely back, then ?" — "Just about.「

「ということは、彼の記憶は完全に回復したに違いない？」－「大差ない」