The consonant digraph TH can make a voiced or unvoiced sound. Notice TH in this sentence: whip the filling in a dish with this whisk. Voiced sounds are made with vibration that can be felt in the throat. Unvoiced sounds are made with a push of air, and there is no vibration. Which of these words do you think have a voiced th?
TH is voiced in: this, that, there, and these.
TH is unvoiced in: the, with, throat, and think.

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