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以f和fe结尾的词，变为复数时多变f及fe为ves：
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1704952569
calf—calves
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1704952571
elf—elves
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1704952573
half—halves
1704952574
1704952575
knife—knives
1704952576
1704952577
housewife—housewives
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1704952579
leaf—leaves
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1704952581
life—lives
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1704952583
loaf—loaves
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1704952585
sheaf—sheaves
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1704952587
shelf—shelves
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thief—thieves
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1704952591
wife—wives
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wolf—wolves
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1704952595
但也有一些以f结尾的词可以直接加-s，如roofs，cliffs，dwarfs，handkerchiefs，chiefs，proofs，beliefs，gulfs。个别词可有两种加法，如：scarf—scarfs或scarves，hoof—hoofs或hooves。
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以o结尾的名词，多数可直接加-s，如：
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1704952599
bamboos cuckoos embryos Filipinos folios kangaroos kilos memos photos pianos radios solos studios tobaccos zoos 有一部分这类词需加-es，如：
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1704952601
dominoes echoes embargoes heroes negroes potatoes tomatoes torpedoes vetoes 下面名词在o后加-s或-es都可以：
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archipelago(e)s cargo(e)s fresco(e)s halo(e)s mango(e)s manifesto(e)s memento(e)s salvo(e)s 还有一些名词有不规则的复数形式。
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最常见的有：
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child—children
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foot—feet
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man—men
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woman—women
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tooth—teeth
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