tired-looking vehicles=vehicles which look tired. 即现在分词本来是系词，tired本来是系词look的表语。它们所构成的复合形容词仍保持现在分词的主动意义，而且保持现在分词的时间与谓语动词时间同时的意义。被修饰名词是looking的逻辑主语。在谓语动词时间这种looking仍然存在者。

hard-won understandings=understandings which were won with difficulty(hard).hard-won是有过去分词和方式副词hard构成的如何形容词。该形容词仍保持被动和完成的意义，即被修饰名词与win是被动关系，而且win的动作已经完成。意义为来之不易的，辛苦赢得的。

man-made satellite=satellite which was made by man.

home-made wine=wine which was made in the home.

hard-working people=people who work hard.

peace-keeping troops=troops which keep peace.