Did you lose consciousness?

你失去知觉了吗？

At 82 degrees you can lose consciousness.

在华氏82度(摄氏27.778度)时，你可能会失去意识。

He looks as if he lose consciousness.

他看来像失去知觉似的。

Weren't you scared? Did you lose consciousness?

你当时不害怕吗，有没有失去知觉呢？

The blow caused him to lose consciousness.

那一击打得他失去了知觉。