宾语从句的引导词
(1)陈述句作宾语从句引导词用that。that在从句中不充当任何句子成分,无实际意思,在口语或非正式文体中常省略。如:
Hesaid(that)itwascoldinMoscow.Motherknows(that)Jimwillworkhard.
(2)一般疑问句作宾语从句引导词用whether或if。whether或if表示“是否、是不是”的意思,不能省略。如:
Iwanttoknowif/whethertheanswerisright.Lucyaskedif/whethertheyhadacheapershirt.
(3)特殊疑问句作宾语从句引导词用原来的疑问词,只不过在宾语从句中称作连接代词或连接副词。连接代词或连接副词在从句中充当一定的句子成分,有一定的意思,不能省略。如:
Pleasetellhimwhichclassyouarein.HeaskedmewhomIwaswaitingfor.
Couldyoutellmewherethepostofficeis?Pleaseasktheteacherhowwecangetthere.