決定去做一件事，如果doing表現正在做，都正在做了，還需要決定嗎，所以必然不是doing

Decided to do還是decided doing。答案是 decided to do是正確的，中文的意思是決定或者下決心做什麼事。

例如， When he was 18 years old，he decided to join the PLA to protect his country.這句的中文意思是，當他18歲的時候，他決定加入人民解放軍，保衛自己的祖國。

decided to do

網路釋義

決定做某事

決定做

決定去做

短語

Decided to do something 決定幹某事 ; 決定做某事 ; 決定去做某事

decided to do it 決定去做

We decided to do this 我們決定做好這件事

decided doing釋義為

決定做

網路釋義

短語

Decided without doing sth 決定不做某事

我來回答一下吧。

個人覺得這個問題的答案是：decide to do sth.

這個短語的中文意思是“決定幹某事”，後面常跟to do sth.

例如：They decided to have a sports meet last Sunday.

We decide to travel to Beijing next year.

Have you decided to go there?

希望我的回答能夠儘快幫到你啊！