名词单数变复数Whats this in English?Its an apple.What are these?They are two apples.-What are these?-Whats this?-Its a pen.-They are pens.-What are those?-Whats that?-Its an English book.-They are English books.watchesorangespens-Whatre these ?-Theyre .名词一名词分可数名词和不可数名词 1. 可数名词 个体名词都是可数名词。每个可数名词都有其单数和复数形式。 A. 单数:表示“一个”的概念。用名词的单数时,名词前需加 a 或 an。如:a book(一本书), an apple(一个苹果), an orange(一个橘子)B. 复数:表示两个或两个以上的物体。 如:two pencils(两枝铅笔), three weeks(三周)等。1.一般情况下,直接在词尾加-s构成复数形式。如:book-book s, bag-bag s, cat-cat s,