【正文】
無生命的結(jié)尾加 S: photos, pianos 可數(shù)名詞單數(shù)變復(fù)數(shù)的變化規(guī)則: ,直接在名詞詞尾加 s. s, x, sh, ch結(jié)尾的名詞加 es. f或 fe結(jié)尾的名詞,將 f或 fe變?yōu)?v再加 es. y結(jié)尾的名詞,要變 y為 i再加 es. o結(jié)尾的名詞可加 es,但 photo和 piano等除外. 給下列名詞變復(fù)數(shù). am/is he bird lady boy girl wife watch key picture this that family dictionary photo potato are they birds ladies boys girls wives watches keys pictures these those families dictionaries photos potatoes sh