七年级英语下册 Unit 2 Go for it!语法讲义

七年级英语下册Unit2语法讲义 不定代词 一、不定代词的定义 不定代词是不指明代替任何特定名词或形容词的代词，用来指代不确定的人、物或数量。本单元重点学习 neither, none, both, all, either 这几个常用不定代词。 二、核心不定代词精讲 1. neither 和 none neither：表示对两者的否定，意为 “两者都不”。 none：表示对三者及以上的否定，意为 “都不”；还可表示 “零”，可指代可数或不可数事物。 结构（挖空填写） neither (of + 复数名词 / 代词) + 动词（单 / 复数均可） none (of + 复数名词 / 代词) + 动词（单 / 复数均可） 例句 I saw two boys at the door, but neither (of them) is my brother. None (of the students) in my class wants to give up. I thought there was some coffee in my office, but there’s none there. 2. both 和 all both：表示 “两者都”，指代两个人或物。 all：表示 “全体、一切”，指代三者及以上的人或物，也可指代不可数事物。 结构（挖空填写） both (of + 复数名词 / 代词) + 动词复数 all (of + 名词 / 代词) + 动词（单复数根据名词而定） 例句 I like both of the two shirts. All of the students went to the cinema yesterday evening. All was changed. 3. either either：表示 “两者中的任何一个”，意为 “任一、随便哪个”。 结构（挖空填写） either (of + 复数名词 / 代词) + 动词单数 用于主语后：We either go to the park or stay at home. 例句 You can use either of the bathrooms. Either plan sounds great to me. —Which of the two shirts do you want —Either will do. 三、用法对比表 代词 指代范围 含义 动词单复数 neither 两者 都不 单 / 复数均可 none 三者及以上 / 不可数 都不 / 零 单 / 复数均可 both 两者 都 复数 all 三者及以上 / 不可数 都 / 一切 单 / 复数均可 either 两者 任一 单数 四、配套练习 （一）基础填空 There are two apples on the table, but _____ (neither / none) is ripe. —How many students are in the classroom —_____ (Neither / None). I have two brothers, and _____ (both / all) are doctors. _____ (All / Both) of my friends came to my birthday party. You can take _____ (either / neither) of the two books. They are both useful. （二）句型转换 I don’t like this book. I don’t like that book, either.（合并为一句）I like _____ _____ the two books. Tom and Mary are both from America.（改为同义句）_____ _____ Tom _____ Mary are from America. None of the students finished the homework.（改为同义句）_____ the students finished the homework. （三）情景选择 当你想表达 “这两个计划我都不喜欢” 时，应说：A. I like neither of the two plans.B. I like none of the two plans. 当你想表达 “这两个计划随便哪个都行” 时，应说：A. Either of the plans is OK.B. Both of the plans are OK. 五、参考答案 （一）基础填空 neither None both All either （二）句型转换 neither of Both; and No （三）情景选择 A A 不定代词课堂小测 （时间：15 分钟 满分：30 分） 一、单项选择（每题 2 分，共 10 分） There are two trees in the garden, but _____ of them is tall.A. neither B. none C. both —How many eggs are there in the fridge —_____. We need to buy some.A. Neither B. None C. All I have two sisters, and _____ of them are good at music.A. both B. all C. either _____ of the students in my class passed the exam. We were ver ... ...