次の英文(継続を表す過去/未来完了形)を言替えるとどうなりますか？

質問

次の英文(継続を表す過去/未来完了形)を言替えるとどうなりますか？

例えば
We have friends for five years.
「私たちが友達になってから10年になる」ならば
⇒Five years have passed since we became friends.
⇒It has been five years since we became friends.
(参考書forest 4th p81)

となりますが・・・次の英文だとどうなりますか？

They had known each other for ten years when they got married.
「彼らは知り合って10年経って結婚した」(p85過去完了形)
⇒
⇒

また、これはどうなるのでしょうか？
Next month we will have been married for 20 years.(p89未来完了形)
⇒
⇒

独学の者です。ご説明宜しくお願い致します。

回答No.1

bakansky · ベストアンサー

> They had known each other for ten years when they got married.

→ After ten years since they had known each other, they got mariied.

→ It had been ten years since they had known each other when they got married.

> Next month we will have been married for 20 years.

→ Next month, 20 years will have been passed since we got married.

→ It will be 20 years since we got married.

* こういうのはまるで分らないのですが、試しにやってみました。自信はありません。