不定式,后加动词原形。
例句:
It's pathetic that human beings should be condemned to spend the greater part of their lives amid such surroundings.
悲惨的是,人的大半辈子竟被禁锢在这种环境里。
望采纳。
be condemned to to 是不定式
这里的to 是介词,所以后跟名词或动名词,如:
The killer was condemned to death.杀人犯被判死刑.
必须的