一般情况下
1.在清辅音后，如books [buks]
2.在浊辅音和元音后发[z]，如pigs [pigz], trees [tri:z] ？
3.在t,d后与前面的[t],[d]连起来一起读[ts]，[dz],如cats [kts]，beds [bedz]
清辅音共12个： [p] [t] [k] [f] [s] [θ] [] [ts] [tr ][t] [h] [r]
浊辅音共16个： [b] [d] [g] [v] [z] [e] [] [dz] [dr] [d] [ l ] [m] [n] [ ] [ j ] [w]
4.以辅音字母s, sh, ch, x结尾的名词，在词尾加-es, 发[iz]，所以在[s], [z], [], [], [d],[t]后发[iz]
如buses[bsiz], blouses ['blauziz], boxes [bksiz] , dishes [diiz], bridges[bridiz], watches [wtiz] 读出s的读音。
规则动词过去式加ed后的发音规则
1.在清辅音后面 [t]，如：helped [helpt], passed [pɑ:st] 2.在浊辅音和元音后面 [d]，如：borrowed ['brud]，moved[mu:vd] 3.在[t]、[d]音后面 [id]，如：wanted['wntid]，started [stɑ:tid]，needed [ni:did]，counted [kantid]
days ties hands
peaches boxes
leaf-leaves thief-thieves keys
knife-knives cups
dresses dishes faxes bands blouses hero-heroes potato-potatoes books hats suits dogs bags buses classes
shelf-shelves zoo-zoos
photo-photos tobacco-tobaccos fishes wife-wives kilo-kilos
housewife-housewives factory-factories watches boy-boys toys
baby-babies days
piano-pianos army-armies story-stories radio-radios
tomato-tomatoes
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