彼の睡眠中に何者かが押し入った。

tbd

Someone broke in while he was asleep.

私には彼女が何者か分からなかった。

tbd

I had no idea who she was.

昨夜何者かが私の家の近くの小さな店に押し入った。

tbd

Last night someone broke into the small shop near my house.

何者かにうでをつかまれ、彼女は恐くて悲鳴をあげた。

tbd

She screamed with horror as someone took hold of her arm.

何者かが彼女を浴槽で溺死させた。

tbd

Somebody had drowned her in the bathtub.