美式英語正音訓(xùn)練第41期:Exercise 1-54

Exercise 1-54: Intonation and Pronunciation of "That"
    That is a special case because it serves three different grammatical functions.
    The relative pronoun and the conjunction are reducible.
    The demonstrative pronoun cannot be reduced to a schwa sound.
    It must stay .
    Relative Pronoun
    The car that she ordered is red.
    Conjunction
    He said that he liked it.
    Demonstrative
    Why did you do that?
    Combination
    I know that he'll read that book that I told you about.