妹はせっかちだからよく忘れ物をする。

tbd

My sister is always in such a hurry that she often leaves things behind.

私に返事をするのに彼女はややせっかちであった。

tbd

She was a bit hasty in answering me.

せっかちな運転者が赤信号を無視して交差点を通りぬけた。

tbd

An impatient driver forced his way through the crossing against the red light.