YOU SAID:

More recently an opera has been composed and performed.

INTO JAPANESE

最近ではオペラが作曲され、演奏されています。

BACK INTO ENGLISH

Recently, the opera composer, has been playing.

INTO JAPANESE

彼は今朝からずっとテニスをしている。

BACK INTO ENGLISH

He has been playing tennis since this morning.

INTO JAPANESE

彼は今朝からずっとテニスをしている。

BACK INTO ENGLISH

He has been playing tennis since this morning.