frict 6) Frictionless continuant(无摩擦延续音 /r/ is articulated the tip of the tongue is held near to the back part of the teeth ridge but not touching it; the back rims of the tongue are touching the upper molar; the central part of the tongue is lowered, so that the tongue has a curved shape 7) Semi-vowels(半元音 1)/j/ the front of the tongue is raised towards the hard palate, the air passage is wide and the air passes through it 2)/w/ the lips must be rounded and back of the tongue is raised towards the soft palate as for/u: /or even higher, the air passes through the round narrowing between the lips Some people tend to replace /w/by /v/ remember for the /v/words you must keep the lips flat and use the upper teeth to make some friction, for the /w/ words there is no friction and the lips are well roundedfriction. 6) Frictionless continuant（无摩擦延续音） /r/ is articulated the tip of the tongue is held near to the back part of the teeth ridge, but not touching it; the back rims of the tongue are touching the upper molar; the central part of the tongue is lowered, so that the tongue has a curved shape. 7) Semi-vowels（半元音） 1) /j/ the front of the tongue is raised towards the hard palate, the air passage is wide and the air passes through it. 2) /w/ the lips must be rounded and back of the tongue is raised towards the soft palate as for/u:/ or even higher, the air passes through the round narrowing between the lips. Some people tend to replace /w/ by /v/, remember for the /v/ words you must keep the lips flat and use the upper teeth to make some friction, for the /w/ words there is no friction and the lips are well rounded