Two Sounds of Digraph "th"
"th" has two sounds. Strong th tickles your lips. Weak th is very quiet.
that this they them
strong th
third 3rd forth 4th
weak th
leather (strong)
thumb (weak)
1. smoo(th)
2. weather
3. leather
4. the
5. this
6. that
7. then
8. there
9. they