this is an apple and that is a 寫(xiě)出復(fù)數(shù)句.
this is an apple and that is a 寫(xiě)出復(fù)數(shù)句.上句中these或those做主語(yǔ)是be動(dòng)詞用（ ）,名詞用（ this和that則用單數(shù)_.劇中的brothers是可數(shù)名詞brotherde__形式英語(yǔ)中,名次分為單數(shù)和___名詞.可數(shù)名詞分為_(kāi)___名詞和___名詞.可數(shù)名詞分為單數(shù)和__兩種形式：表示一個(gè)人或物,名詞用__形式.
只填一下空就可以。