Brown studied fourteen morphemes which are obligatory in English. Which one of the followings is correct?
AThe prepositions "on" and "in" are developed in a very early stage.正確答案
BThe first grammatical morpheme to develop is the plural /s/.
CThe irregular, third-person singular present tense is developed prior to the irregular past tense of verbs.
DThe articles "a" and "the" are developed in the last stage.
答案與詳解
