a enjoyable day还是an enjoyable

是an enjoyable。

enjoyable前面用an。enjoyab造婷用痃le用作形容词，基本含义是有快乐的，有乐趣的，令人愉快的；enjoyable的副词形式是enjoyably。

I do not think that movie is very enjoyable.

我看那部电影并不怎么有趣。

In fact, life gets more enjoyable as you age.

事实上，生活随着时间的流逝变得更有趣。

We all had an enjoyable evening.

我们全都度过了一个愉快的夜晚。

The hotel staff spares no pain to ensure that our stay is as enjoyable as possible.

旅馆工作人员对我们照顾得无微不至，尽量让我们住得舒适。