指示代词(this,that，these,those)1.口诀：this这个是懒虫，表示近处就用它; that那个很勤劳，表示远处没问题；this,that表单数，要和is一起用，these,those表复数，他们和are是朋友，2.用法: this/that+名词单数/不可数名词these/those+名词复数在疑问句中，this/that问，it来回答 these/those问，they来回答。e g：Thisbook ismine. Thosebooksare yours.Is this your book?-Yes, it is./No, it isnt.Arethese your books?-Yes, they are./No ,they arent.另类词组1. 一个另一个 onethe other(两者)oneanother(大于等于三者)There are two apples on the desk. One is red, the other is green.There are many apples on the desks. One is red, another is green. 2. 一些另一些 somethe others (两组) someothers(大于等于三组)others=other+名词复数 the others=the other+名词复数/another+名词单数There are 20 students in my class. Some are girls, the others are boys.They are from many countries. Some are from China, others are from America ./Other students are from America.另类所有格：表时间、距离+s一个3天的假期 a holiday of three days a three days holiday a three-day holiday(-相连，名词用单数)一个20分钟的路程 a walk of 20 minutes a 20 minutes walk a 20-minute walk