28-辅音[f]

find [faɪnd] 
food   [fuːd] 
flag [flæɡ] 
frog [frɒɡ]
phone [fəʊn] 
afraid [əˈfreɪd] 
after [ˈɑːftə]
defend [dɪˈfend] 
draft [drɑːft]
gift [ɡɪft] 
beef [biːf] 
chief [tʃiːf] 
cough [kɒf] 
graph [ɡræf] 
knife[naɪf]