发 sp st sk 音标的单词 （要这些的开头）

space spade spagheti spangle spade spanner spare spark sparrow spatula speak spear special specious specimen speech speed sphere spice sphinx spider spinach spirit spit splash spoil spoke sponge spoon sport spray spread spring spy ......
stable stab stack staff stage stain stair stake stale stall stamina stamp stand standard staple star starch starfish start state station stationery statistic statue status statutory stay steady steak steal steam steel steep step stereo stern stick stone stock stop store storm story stout stove straight stranger stress stuck student studio style ......
skate skeleton skill sketch ski skiff skin skip skirt skull sky skimp skint skulk skunk skein skim ......

speak spy spoken spoke spread space sponge spring....
stand steal still stone star start strive stick .....
skull skear skate sketch sky ski

speak spoke spread sponge
stand steal still stone
skull skear skate sketch

在S后面如果重音在S后，那么后面的清辅音要相应的浊化。如果重音不在这里，那么就不要浊化。