This is Sam's sweater That is a cap . Those are shoes. trousers Example: Those are trousers. Example: That is a sweater . sweater Example: That is a shirt. shirt These are Sam’s trousers. And those are Amy’s shorts. This is Sam’s sweater. And that is Amy’s shirt. Sam’s and Amy’s clothes are wet. 名词和名词之间所属关系的格叫做名词所有格。 Example: Lingling’s ruler. 两个或者两个以上的名词共同所有时,在最后一个名词后加’s.