ing和ed的问题比较麻烦高分求助好像是关于非谓语动词
先举两个选择题：
_______in a white uniform,he looks more like a cook than a doctor.
A:Dressed B:To dress C:Dressing D:Having dressed
_______from heart trouble for years,Professor White has to take some medcine with him wherever he goes.
A.Suffered B.Suffering C.Having suffered D.Being suffered
请先说明选择答案,并说明为什么,还有什么时候应该用“ed”,什么时候用“ing”什么时候用“having + ed”什么时候用“to”什么时候用“being+ed”.请认真回答.
就是zyyfaith同学说的，第一题选择A。什么时候用doing呢？
= =不好意思……能举个例子否……