1. I had to forgo the opportunity to study abroad due to financial constraints.
我不得不因为经济限制而放弃了出国留学的机会。

2. The athlete chose to forgo the prize money in order to support a charitable cause.
这位运动员选择放弃奖金，以支持慈善事业。

3. We decided to forgo dessert and save room for the main course.
我们决定不吃甜点，为主菜留出空间。