以字母 "o" 结尾的英语单词在英语中非常常见，并且有多种变化形式来构成复数。以下是一些常见的例子和规则：
一般规则 ：许多以 "o" 结尾的单词在变为复数时，直接在词尾加 "es"。例如：
potato → potatoes
echo → echoes
tornado → tornadoes
特殊规则
以元音字母加 "o" 结尾的单词，通常直接加 "s"。例如：
radio → radios
video → videos
zoo → zoos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos
alto → altos
photo → photos
solo → solos
kilo → kilos
memo → memos
solo → solos[