人教版初一英语上册重点句型和单词,词组答:如:day-days, boy-boys, toy-toys, key-keys, ways 四)以o结尾加s(外来词)。如:radios, photos, 但如是辅音加o的加es:如: tomatoes西红柿, potatoes马铃薯 五)以f或fe结尾的变f为v再加es(s)。如:knife-knives, wife-wives, half-halves, shelf-shelves, leaf-leaves, yourself-yourselves 六)单复数...