There are different types of affixes or morphemes. The affix "ed"in the word "learned”is known as a (n) ______ . ()
A、derivational morpheme
B、free morpheme
C、inflectional morpheme
D、free form
【正确答案】：C
【题目解析】：(P52):屈折词缀(也叫屈折词素)表现的是如数、时态、级、格这样的语法关系或语法范畴。 learned中ed表示时态或语态变化,它是屈折词缀。