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1、一、复数形式第四单元:sheep?sheep(绵羊)goat?goats(山羊)goose?geese(鹅)齿)hen?hens(母鸡)cow?cows(奶牛)foot?feet(脚)1amb?IambS(羊羔)horse?horses(马)tooth?teeth(牙二、可数名词变复数的规则:1、一般情况下,在单数名词词尾加“s”.如:cat?catsdog?dogsbook?booksru1er?ru1ers2、在以s,ss,x,sh,ch结尾的名词后面加“es,如:box?boxespeach?peachesbus?busesc1ass?c1asses3、在以o结尾的单词后面加“es”,如
2、:tomato?tomatoespotato?potatoes4、以元音字母加y结尾的名词,直接加“s”如:boy?boystoy?toysday?days以辅音字母加y结尾的名词,去掉y后加“ies”,如:baby?babies1ady?1adiesbutterf1y7butterf1ies5、以f,fe结尾的名词,去掉f或fe后加“ves”,如:she1f?she1ves1eaf?1eavesknife?knives三、IIike后面要加可数名词的复数形式或者不可数名词,如:I1ikeapp1es.我喜欢苹果。IIikeChiCken.我喜欢鸡肉。四、特殊疑问句:Whatarethese?Whatarethose?Whatarethey?在回答时,都要用“Theyare”Whatisthis?Whatisthat?Whatisit?在回答时都要用It,sa(an)一般疑问句:AretheSe?Arethose?Arethey?的回答形式也都是一样的,肯定回答:Yes,theyare.否定回答:No,theyaren,t.一般疑问句:Isthisa(an)?Isthata(an)?Isita(an)?的回答形式也都是一样的,肯定回答:Yes,itis.否定回答:No,itisn