I wish to participate in the competition.

想?yún)⒓颖荣愑糜⒄Z說就是"I want to participate in the competition."

我想去參加比賽，英文就說 wanna go competish.

I wish to participate in a competition.
解釋：如果你想用英語表達(dá)“我想去參加比賽”，你可以說“I wish to participate in a competition.” 這里，“I”代表“我”，“wish to”表達(dá)“希望”，“participate”表示“參與”，“in a competition”指的是“在比賽中”。此句既簡潔又符合英語表達(dá)習(xí)慣。

I want to participate in a competition.