th的发音有哪些规则?如何发音?答:(1) th位于词首时,可以从词性上判别其应有的读音。在名词、动词、形容词和数词中th发清辅音θ。如:thing, theatre, thunder, thermos, Thursday, theory, theme, throat, thread, think, thank, thrive, thicken, thirteen, thirty, third, thousand, thick, thirsty, thoughtful, thorough 在代词...