Měi ɡe rén dōu fēichánɡ kāixīn.

Everyone was thoroughly entertained.

每个人都非常开心。

Notes:

每(měi): every

个(ɡe): measure word

人(rén): people

都(dōu): all

非常(fēichánɡ): extremely

开心(kāixīn): happy

Example:

A：昨天的晚会怎么样？

     How was the party last night?

     Zuótiān de wǎnhuì zěnmeyànɡ?

B：每个人非常开心。

     Měi ɡe rén dōu fēichánɡ kāixīn.

     Everyone was thoroughly entertained.