初一上册英语句型,七年级上册英语该掌握一些什么句子与单词

初一上册英语句型,七年级上册英语该掌握一些什么句子与单词

我们知道名词可以分为可数名词和不可数名词,而不可数名词它没有复数形式,但可数名词却有单数和复数之分,复数的构成如下：
一）在后面加s.如：fathers, books, Americans, Germans, apples, bananas
二）x, sh, ch, s, tch后加es.如：boxes, glasses, dresses, watches, wishes, faxes
三）1）以辅音字母加y结尾的变y为i再加es 如：baby-babies, family-families, duty-duties, comedy-comedies, documentary-documentaries, story-stories
2）以元音字母加y结尾的直接加s.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