三、语法:复习名词性从句引导名词性从句的连词:who,whom,whose,what,which,when,where,why,how,howmany,howlong,howfar,that,if,whether,whatever,however,whenever,wherever名词性从句包括:主语从句:Whatyousaidsoundsreasonable
表语从句:ThisiswhatIwasaskedtodo
宾语从句:Nobodyknowswhobroketheglass
同位语从句:Theideathatwe’llgooutforapicnicisgreat名词性从句应注意事项:1、从句的语序为陈述句;2、连词that不充当任何成分;3、what总是要充当主语、宾语、表语和定语;4、If和whether的区别:If引导条件状语从句和宾语从句
Whether引导宾语从句、主语从句、表语从句和同位语从句
当if和whether引导宾语从句的区别,即用whether不用if的情况:(1)
作介词宾语Itdependsonwhetheritisfine
Whether+todoI‘mnotsurewhethertoleavethisafternoon
WhetherornotHecannotdecidewhetherornottaketheexam
作discuss的宾语Wearediscussingwhetherwewillholdameetingthisweekend5、doubt用于肯定句中,宾语从句可以用if或whether引导
Idoubtif(whether)youwillcomeforavisittomorrow
doubt用于否定句或疑问句中,宾语从句用that引导
Hedoesn’tdoubtthathismotherwillg