PROGRESSIVE ASSIMILATION o C/V + ‘s’ : /kaet – kaets/ /dɒg - dɒgz/ /pleІ – pleІz/ /wІʃІz/ o C/V + ‘ed’: /stɒp - stɒpt/ /pʊł - pʊłd/ /pleІ – pleІd/ /stɑ:tІd/ Examples in Czech: /ř/ třeba - /ř/ is unvoiced because of /t/ dřevo - /ř/ is voiced because of /d/