關於th為什麼要發清子音卻要發濁子音
th位於詞首時，可以從詞性上判別其應有的讀音。在名詞、動詞、形容詞和數詞中th發清子音θ。如：thing, theatre, thunder, thermos, Thursday, theory, theme, throat, thread, think, thank, thrive, thicken, thirteen, thirty, third, thousand, thick, thirsty, thoughtful, thorough 在代詞和一些功能詞中th發濁子音.如： them, their, theirs, there, the, than, then, though, thus, therefore, they。只有介詞through是個例外。
th位於詞尾（或音節之尾）時，其讀音多數是清子音θ，如：bath, breath, tooth, 等。只有在少數單詞中，如：with, smooth 中讀濁音稹?
th在詞中並且後面接er時，或者最後一個字母是不發音的e時，通常也發濁子音稹＠紓篺eather, weather, whether, leather, further, father, bathe, breathe, southern, northern, either等。在其他情況下發清子音θ。例如：author, faithful, method, nothing, anything, healthy, wealthy。
試讀下列單詞: mother, father, another, brother, health, wealth
關於th為什麼要發清子音卻要發濁子音
th位於詞首時，可以從詞性上判別其應有的讀音。在名詞、動詞、形容詞和數詞中th發清子音θ。如：thing, theatre, thunder, thermos, Thursday, theory, theme, throat, thread, think, thank, thrive, thicken, thirteen, thirty, third, thousand, thick, thirsty, thoughtful, thorough 在代詞和一些功能詞中th發濁子音.如： them, their, theirs, there, the, than, then, though, thus, therefore, they。只有介詞through是個例外。
th位於詞尾（或音節之尾）時，其讀音多數是清子音θ，如：bath, breath, tooth, 等。只有在少數單詞中，如：with, smooth 中讀濁音稹?
th在詞中並且後面接er時，或者最後一個字母是不發音的e時，通常也發濁子音稹＠紓篺eather, weather, whether, leather, further, father, bathe, breathe, southern, northern, either等。在其他情況下發清子音θ。例如：author, faithful, method, nothing, anything, healthy, wealthy。
試讀下列單詞: mother, father, another, brother, health, wealth