1肯定句改否定句的方法1.be动词后not如:isnot=isnt,arenot=arent,amnot=amnot(没有缩写形式)2.在情态动词can,should,will等后加not如:cannot,shouldnot,willnot;3.无be动词无情态动词,在实意动词前加助动词否定形式dont/doesnt/didnt注意:助动词后,动词要用原形4.some改成any如:Arethereanybooksinyourbag?肯定句改成否定句如:Iamagirl.→Iamnotagirl.Youareastudent.→Youarenotastudent.→Youaren’tastudent.Thi...
A:名词专项1、可修饰名词的常用词:修饰可数名词与不可数名词:some,any,alotof,lotsof,plentyof饰可数名词的有:many,(a)few,alarge(great)numberof只修饰不可数名词的有:much,(a)little,agreatdealof2、难点1)名词所有格的归纳1、astudentsroom,studentsrooms,fathersshoes。2、ChildrensDay3、afriendofmyfathers4、atwentyminuteswalk,tenmilesjourney,aboatslength,twopoundsweight,tendollarsworth。(说明:表...
#01基础部分反应方程式(若是离子反应现象条目则写离子方程式)黄色的火焰,生1钠在空气中燃烧成淡黄色固体2Na+O2Na2O2钠表面很快变暗黄色火焰,生成2钠块在空气中氧化4Na+O2=2Na2O白色固体3钠在氯气中燃烧2Na+Cl22NaCl研磨爆炸剧烈,钠熔化成4钠与硫粉研磨2Na+S=Na2S银白色小球,浮5钠与水反应2Na+2H2O=2Na++于水面,四处游2OH-+H2↑动等放热、淡黄色变6过氧化钠与水的反2Na2O2+2H2O=4Na白同上应++4OH-+O2↑...