suffer和suffer from,到底什么时候用suffer,什么时候用suffer from

suffer
[美国] [ˈsʌfɚ] [英国] [ˈsʌfə]

1....及物动词容许;任凭[O2]

(常用於否定句)忍受
I cannot suffer such rudeness. 我不能容忍这种粗鲁的举止。

遭受;经历
He suffered many humiliations before he became a football star. 他在成为足球名将前受过许多屈辱。

不及物动词受惩罚;被处决[(+for)]
He suffered for his offence. 他因自己的过错而受到惩罚。

受损害,受损失;变糟[(+for/from)]
This scientific instrument suffered severely. 这部科学仪器受到严重损坏。

受苦;患病[(+from)]
suffer from
因(疾病)而痛或不舒服;因...而更糟;受...之苦
He suffered from poverty all his life. 他一生受贫穷之苦。
My father suffers from high blood pressure. 我父亲有高血压。
They suffered a great deal in those days. 那时他们吃了不少苦。