彼はそのとき寝ぼけていたらしい。

tbd

It seems that he was half asleep then.

よく寝ぼけます。

tbd

I'm often only half awake.

I'm often half-asleep.

I'm often half asleep.

うちの弟は、よく寝ぼけて変なことを言い出す。

tbd

My little brother gets delirious when he's sleepy. He says the weirdest things.