1This morning — referring to the morning of the current day. The reading けさ is the everyday one; こんちょう is a more formal alternative.
今朝は寒くて、布団から出たくなかった。
This morning was so cold I didn't want to get out of bed.
今朝のニュースで大きな地震があったと知った。
I found out from this morning's news that there had been a big earthquake.
今朝はいつもより早く家を出た。
This morning I left home earlier than usual.
今朝、母から電話があった。
I got a call from my mother this morning.