Phonetics.

g   - перед e, i, y general religious lounge gin Исключения: get girl give begin
  go gate guide glass bag ground galley  
c   - перед e, i, y face civil cycle receive proceed  
  call class cup crew cake club coffee cot  
ck   deck back lock check shock clock  
ch   chair chance channel change check  
  chord mechanic technical Christmas  
sh   shop she shelf wish wash shade fresh  
th   thick thin thing thanks throw three  
  this these those that weather their  
ng   long length wing ring spring wrong  
nk   bank link tank drink thank think wink rank