suffer一词有两种词性
及物vt.指经历,忍受,容许,任凭
不及物vi.指受苦;患病,受损害,受损失;变糟,受惩罚;被处决
显然,你给出的句子“He often suffers headaches”
表面意思是他经常(遭)受头疼困扰.有受苦,患病之概念
在给你几个例句慢慢揣摩下
vt.
1.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.
2.(常用于否定句)忍受
I cannot suffer such rudeness.
我不能容忍这种粗鲁的举止.
3.容许;任凭[O2]
vi.
1.受苦;患病[(+from)]
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.
2.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.
3.受惩罚;被处决[(+for)]
He suffered for his offence.
他因自己的过错而受到惩罚.