4、sthatcanintroducenounclauses.1)连接代词:who,whose,whom,what,which。有词义,在从句中担任成分,如主语、表语、宾语、或定语等。2)连接副词:when,where,why,how。有词义,在从句中担任成分,作状语。3)连接词:that,whether,if,asif。that无词义,在从句中不担任成分,有时可省略;if(whether),asif虽有词义,但在从句中不担任成分。●whether与if区别1)whether和if在宾语从句中可以互换,但是作介词宾语时连接词一般用whether。2)后面直接跟or not 时用
7、countrymayreflecttheculturaldifferencesbetweencountries.11)It all depends on ________ they will come back. 12)________the meeting will be put off has not been decided yet. ●who/whoever,what/whatever等的区别(A)whatever/whoever可引导主语,宾语,表语从句,并在从句中做主语,宾语,表语。这种用法中,what