1、,unit 8 Thats my book.,lesson 2,语法点,Is this.?这是.吗?肯定回答时用Yes,it is.否定回答时用No,it isnt.例:Is this a pencil?Yes,it is./No,it isnt.用ruler pencil case book school bag组句子,Is that.?那是.吗?肯定回答时用Yes,it is.否定回答时用No,it isnt.例:Is that a pencil?Yes,it is./No,it isnt.用ruler pencil case book school bag组句子,注意回答时,不能够出现t
2、his/that,而是用it代替一般疑问的肯定回答用: Yes, +人称代词主格+动词; 而 this/that 是指示代词,可以用在陈述句中,如This/That is a book.而不能用在肯定回答中,否定回答也是同样的道理。,练一练:1.Is this your mum?A.Yes,she is.B.Yes,it is.C.Yes,this is.,正确选项:B,2.Is that your pencil?A.Yes,that is.B.No,it isnt.C.Yes,it isnt.,正确选项:B,lesson 3,a和an都是 “一个”的意思(等同于one),辅音音素前用a,元音音素前用an.,a / an用法,a和an很相像(1),两者用法不一样:辅音单数a提前,元音单数an优先(2)。代在名前来相伴,a和an看不见(3)。注解:(1)a和an均为不定冠词,用于单数可数名词前,强调其类别,表泛指的“一(个、块、只)”(2)a用于辅音音素(而不是辅音字母)开头的单数可数名词前,an用于元音音素(而不是元音字母)开头的单数可数名词前。,