The consonant “th” can be read [θ] as in the word “through,” and can also be read [ð] as in the word “weather.” The “th” sound is more heavily pronounced when read as [ð] rather than [θ].

Listen to the words and repeat. Pay attention to the “th” sound.

[θ]

thanks

theater

thing

birthday

growth

[ð]

their

brother

rhythm

leather

clothes

Listen and read the following sentence.

I think I thought a thought, but the thought I think I thought was fraught with this other thought I think I thought.