一、肯定句改否定句的方法——一步法1、在be动词后加not。如：isnot，arenot，amnot，wasnot，werenot；2、在can，等后加not。如：cannot3、上述都没有的，在动词前加助动词否定形式donot,doesnot.(don’t/doesn’t)4、some改成any。二、肯定句改一般疑问句的方法——三步法1、把be动词放在句首，剩下的照抄，（some改成any，my改成your等）句点改成问号。2、把can，等放到句首，剩下的照抄，（some改成any，my改成your等）句点改成问号。例如：陈述句:Theyareinthepark.Hecanplaytheguitar..一般疑问句:Aretheyinthepark?Canheplaytheguitar?把下列句子变成一般疑问句Iamlisteningtomusic._______________________________________Mikeisastudent._______________________________________Sarahcancleantheclassroom.________________________________________Theyareinthezoo.________________________________________5.Therearesomeflowersinthevase.________________________________________6.Thisismysister._________________________________________7.Wearesweepingthefloor.__________________________________________3、上述都没有的，在句首请助动词Do/Does帮忙，剩下的照抄，（some改成any，my改成your等）句点改成问号。例如：陈述句:Iliketheducks.Helikesthedogs.一般疑问句:Doyouliketheducks?Doeshelikethedogs?把下列句子改为一般疑问句。Weneedsomemasks._________________________________Theylikemakingthepuppet._________________________________3.SuHaiandSuYangliveinanewhouse._________________________________________________4.Iputabookonmyhead._________________________________________________5.Theysing“Intheclassroom”together._________________________________________________6.WeplaybasketballonSundays._________________________________________________7.Tomlikeslisteningtomusic____________________________________________三、肯定句改特殊疑问句的方法——四步法1、在一般疑问句的基础上，句首添加一个疑问词即可，可根据划线部分确定是什么疑问词。2、接着找be动词或can，等放在疑问词后面，若没有则请助动词do/does帮忙，写在疑问词后面，howmany除外，必须先写物品，再写be动词等。3、划线部分去掉后剩下的内容照抄，（some改成any，my改成your等）4、句点改成问号。句型转换题1.Thegirlissingingintheclassroom.(改为否定句）(改为一般疑问句)2.Theyarelookingforbag.(对画线部分提问）3.Iamridingmybikenow.(同上）4.Therearetwelvestudentsoverthere.(同上）5.IcanspeakEnglish.(改为一般疑问句）6.Iamwritingnow.(同上）7.Ihaveadeskandachair.(用He做主语改写句子）8.Sheisbuyingsomefoodinthesupermarket.（改为否定句）9.Iamill.（对画线部分提问）10.Doesshelikegrowingflowers?（给予否定回答）