课件15张PPT。Unit 5Plus and minusDo some maths work10+5=? 20-11=?
9+7=? 13-6=?
8+12=? 17-9=?
13+5=? 19-15=?
111213151617181920one rubbertwo rubbersone bookfive booksone bikeseven bikesone peachfour peachesone orangeeight orangesone keyten keysone carthree carsone knifeeleven knivesone busfour buses 1) 一般情况
加 –s 1.清辅音后读/s/; book-books 2.浊辅音和元音后读 /z/; bike-bikes
2)以s,sh,ch,x等结尾的词
加 -es 读 /iz/
bus-buses peach-peaches box-boxes
3)以fe结尾的词
变fe为v,再加es 读 /z/
knife-knives
1914153131Finish the table