1、名词、动词、形容词、数词等实词中的th读[θ],如theatre,thief,thousand,Thursday,thank,think,throw,thick,thin,thankful,three,third,thirteen,thirty,thing,through,throughout.
2、指示代词this,that,these,those；人称代词they,that,these,those；人称代词they,them,themselves,their,theirs；副词then,there；连词than,though和定冠词the中的th读[e],连词through,throughout例外.