bench→benches. ② 部分以O结尾,变复数需要加es的词:negro → negroes, hero → heroes, tomato →
tomatoes, potato → potatoes, echo → echoes。以o结尾, 变复数只加s的词: photo→photos, piano→pianos, audio → audios, video → videos ③ 以辅音字母加y结尾的名词, 变y为i, 再加es. 如:family→families,city→cities,party→parties. ④ 以f或fe结尾的名词,变f或fe为v,再加es.如:shelf→shelves, wolf→wolves, life→lives, knife→knives. ⑤ 不规则变化需要特殊记忆:man→men, woman→women, sheep→sheep, tooth→teeth, fish→fish, child→children, ox→oxen, goose→geese
4、不规则动词(特殊情况)
have be
gets takes plays
guesses fixes finishes teaches goes和does
studies tries flies carries worries
has is
可数名词变复数
1. 大规律:绝大部分单数名词变复数,词尾加s。如:map → maps, boy→ boys, horse→ horses, table→ tables.
2. 特殊情况: ① 以s, x , sh, ch 结尾的词加es. 如:class→classes, box→boxes, dish→dishes,
动词第三人称的变形