R is usually pronounced /r/ (rhotic sound), but it can be non-rhotic as well.
The “r” sound can change depending on the position in the words or in their origin.
- non – rhotic:
Voiced rhotic sound
- pronounced as usual
- when r is the final letter of the word or r is written before consonants and before a final –e.
- It is pronounced more softly or not even pronounced.
- rh- in the beginning of a word
- Pronounced as a common r (/r/)
External link to Sounds of letter R exercises (1238).