我找了半小时才找到我的钥匙 的英语句子

I didn't find my key until half an hour later.

如果要突出“才”的话，应该是这么翻的。

it took me half an hour to find my keys

it took half an hour before i found my keys

I spent half an hour finding my key

It took me half an hour to find my key(s).

It took me half an hour to find my keys.

I spent half an hour looking for my keys until I found them