Did you know that the ○ baseball tournament is happening right now? ▲ is in the tournament.
Did you know that the ○ baseball tournament is happening right now? ▲ is competing in the tournament too.
Did you know that the ○ baseball tournament is happening right now? ▲ is participating in the game too.
"○という野球大会が開催中ですが知ってる？▲国も参加中だよ" という日本語は、以下のように英語で説明ができます。
「Did you know that the ○ baseball tournament is happening right now? ▲ is in the tournament.」
「Did you know that the ○ baseball tournament is happening right now? ▲ is competing in the tournament too.」
「Did you know that the ○ baseball tournament is happening right now? ▲ is participating in the game too.」
○という野球大会 ○ baseball tournament
開催中 happening
参加中 be participating in
I hope this will help you.
お役に立てば嬉しいです
イギリス 
