early　早い時間に

   early  早くに・早い時間に　　 fast    速く（スピードが速い）

　 late   遅くに・遅い時間に　　 slowly  ゆっくりと（スピードが遅い）


                early in the morning　朝早くに
       I got up early.               
       I got up early in the morning.

                late at night　　　   夜遅くに
  I went to bed late.               
  I went to bed late at night.