小学英语比较级和最高级.ppt

tall,Bob,Tom,Mr.Zhang,Cheng long is taller than Pan changjiang. Yao Ming is the tallest of the three.,fast,strong,baby,Tom,Mr. Black,Bob,Tom,Tim,形容词的比较级 两个事物或人的比较用比较级，比较级后面一般带有单词than。,形容词的最高级 表示三者或三者以上（人或事物）的比较用最高级，最高级的前面一定要加定冠词the。,比较级与最高级的区别,形容词比较级和最高级的规则变化,1:单音节词 ，在词尾加er构成比较级， 加est构成最高级。,tall- taller - tallest,longlongerlongest smallsmallersmallest shortshortershortest newnewernewest,2:以不发音的e结尾,直接在词的后面加 r构成比较级,加 st构成最高级,nice- nicer -nicest large larger- largest,重读闭音节词 ,双写结 尾的辅音字母, 再加er构成比较级，加est构成最高级。,hot hotter- hottest bigbiggerbiggest fatfatterfattest thinthinnerthinnest,以辅音字母+y的词, 把y变i加er构成比较级，把y变i加est构成最高级。,easy- easier easiest busy busier busiest heavyheavierheaviest happyhappierhappiest,一、写出下列形容词的比较级和最高级 old_ young_ tall_ long_ _ short_ _ strong_ big_ _ small_ _ fat_ thin_ _ heavy_ _ high_ _ early_ easy_ _,比较级句子结构： A + is/are + 形容词比较级 + than + B For example： Tom is older than bill. The tree is taller than the flower. His picture is nicer than hers,最高级的句子结构： A + is/are + the + 最高级 + 范围,For example： Russia is the largest county in the world. Lucy is the tallest girl in the class. The nile is the longest river in the world.,二、根据句意填入单词的正确形式,1 My brother is two years _(old) than me. 2. What is _(long ) river in the world?. 3. Is your sister _(young) than you? Yes, she is. 4. Who is _(thin) in your class ?. 5. Whose pencil-box is _(big), yours or hers? 6.My eyes are _(big) than her 7.Which is _(heavy), the elephant or the pig? 8.Who gets up _(early), Tim or Tom?,