4.下列以ffe结尾只能+s roof gulf cliff((悬崖)ree暗礁)chie(首 领,酋长) proof belief safe 不管是在屋顶上海湾里悬崖上还是碰到暗礁 酋长都有他的证据和信念守住那保险箱
4.下列以f/fe结尾只能+s roof gulf cliff（悬崖） reef( 暗礁） chief(首 领，酋长） proof belief safe 不管是在屋顶上海湾里悬崖上还是碰到暗礁 酋长都有他的证据和信念 守住那保险箱
合成词单数变复数的规则: 1. man-doctor-men-doctors woman-teacher-women-teachers 2. go-betweens touch-me-nots forget-me-nots grown-ups fathers-in-law brides-to-be passers-by lookers-on look-outs editors-in-chief film-goers wrong-doers fault-finders
合成词单数变复数的规则： 1.man-doctor→men-doctors woman-teacher→women-teachers 2.go-betweens touch-me-nots forget-me-nots grown-ups fathers-in-law brides-to-be passers-by lookers-on look-outs editors-in-chief film-goers wrong-doers fault-finders
单复数同形的词: Chinese/Japanese people sheep d eer fish means crossroads(十字路口) species(物种,种类) offspring(后代) series (系列) catt午) spacecraft(太空船)
单复数同形的词： Chinese/Japanese people sheep deer fish means crossroads (十字路口） species（物种，种类） offspring(后代） series（系列） cattle(牛） spacecraft（太空船）
单复数表示不同的含义 fish---fishes fruit---fruits food---foods wOi worKS water---waters custom---customs content---contents g00d-00d iron---Irons green---greens damage- damages(赔偿金) air---aIrs (架子) put on/throw off pain---panns brain-- brains(头脑智能) arm---armns look---looks
单复数表示不同的含义 fish---fishes fruit---fruits food---foods work---works water---waters custom---customs content---contents good---goods iron---irons green---greens damage---damages（赔偿金） air---airs（架子）put on/throw off pain---pains brain---brains(头脑 智能） arm---arms look---looks
下列名词总是用复数形式 shake hands with sb take measures/steps as follows(如下) gIve regards to take turns to do sth by turns hurt one's feelings(伤人感情) take notes take pains(下功夫) have words with in high/low spirits make preparations for see si ght观光) go to the pictures working conditions(工作条件) travel expenses(路费) come to terms with be on good/bad terms with lazybones belongings surroundings congratulations ashes savings(储蓄) outskirts(市郊) earnings(薪水)
下列名词总是用复数形式 shake hands with sb. take measures/steps as follows （ 如下） give regards to take turns to do sth by turns hurt one’s feelings(伤人感情） take notes. take pains(下功夫） have words with in high/low spirits make preparations for see sights(观光） go to the pictures working conditions(工作条件） travel expenses(路费） come to terms with be on good/bad terms with lazybones belongings surroundings congratulations ashes savings(储蓄） outskirts(市郊） earnings(薪水）