He is sleeping poorly.

他睡不好。

He has difficulty in sleeping, inability to concentrate.

他不易入睡，也難集中精神。

It is usually hard for her to fall asleep when she goes to bed at night.

她晚上就寢，很難入睡。

He wakes during the night or early morning and finds it difficult to fall asleep again.

他晚間或清早醒來后，再也不能入睡。

He has nightmares occasionally.

他有時做噩夢。

金融危機的時候不要讓英語成為睡不好覺的原因哦，睡前看看《職場升職手冊》，給自己吃顆定心丸吧。