Consonant /I/ and /r/ - SS1 English Lesson Note
To produce /r/, let the tip of the tongue nearly touch your alveolar ridge. But when you make the /l/ sound, you let the tip of your tongue make contact with the alveolar ridge and also force the air out through the sides of your tongue.
Example
/l/ /r/
London Riot
Lamb Run
Follow Royal
Challenge Sprout