I had to wait half an hour for a bus.

我得等半小时的公共汽车。

《牛津词典》

I had to wait half an hour to jump. I was the twelfth in line.

我得等半个小时才能跳，因为我排在第十二个！

youdao

Ann: Would you wait half an hour?

安：你能等半个小时吗？

youdao

You have to wait half an hour for that revelation, and it's too late.

BBC: Liar

And yet I often wait for half an hour at peak times cursing taxi cab service in San Francisco.

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In March, more than 300 ambulances had to wait more than half an hour before delivering their patients to hospital staff.

BBC: Royal Cornwall Hospital ambulance waiting crisis 'over'