宾语从句whether与if的用法课件.ppt

宾语从句中引导词宾语从句中引导词宾语从句中引导词宾语从句中引导词whetherwhetherwhetherwhether和和和和if if if if的用法的用法的用法的用法 宾语从句的定义置于动词、介词等词性后面起置于动词、介词等词性后面起宾语作用宾语作用的的从句从句叫宾语从句。叫宾语从句。引导词引导词whether与与if当宾语从句是一般疑问句时，由连词当宾语从句是一般疑问句时，由连词whetherwhether或或ifif引导，引导词引导，引导词whether/if whether/if 的意义为的意义为“是是否否”，在从句中不作成分，不能省略。，在从句中不作成分，不能省略。e.g.Lily wanted to know if/whether her grandma liked the handbag.44介词后的宾语从句用whetherWe are talking about whether we can get the chance.01whether引导的宾语从句可以与or not连用He doesnt know whether she will come or not.02whether与if的区别503不定式前用whetherI just wonder whether to stay for another hour.04whether引导的宾语从句可以放句首Whether they will join in the picnic I dont care.61.I wonder _ well finish the task on time.2.I want to know _ its good news or not.3.We are talking about _ we admit students into our club.Exerciseswhether/ifwhetherwhether71.介词后的宾语从句用whether2.whether引导的宾语从句可以与or not连用3.whether引导的宾语从句可以放句首4.不定式前用whetherSummary8HomeworkDo the exercises in Workbook Period 3Thank you for Thank you for listening!listening!ByeBye