问题标题：
【表语是什么?怎么找?】
问题描述：
表语是什么?怎么找?
李志平回答：
一定义：
A表语从句就是用一个句子作为表语.说明主语是什么或者怎么样,由名词、形容词或相当于名词或形容词的词或短语充当,和连系动词一起构成谓语.
Theproblemispuzzling.
主语连系动词形容词作表语
Theproblemiswhenwecangetapayrise.
主语连系动词一个句子作表语---表语从句
B连接表语从句的连接词有：that,what,who,when,where,which,why,
whether,how.
Hehasbecomeateacher.
Hehasbecomewhathewantedtobetenyearsago.
Shehasremainedthereforanhour.
ShehasremainedwhereIstoodyesterdayforanhour.
Hissuggestionisgood.
Hissuggestionisthatweshouldstaycalm.
Thequestionisconfusing.
Thequestioniswhenhecanarriveatthehotel.
whowilltravelwithmetoBeijingtomorrow.
whyhecriedyesterday.
howIcanpersuadehertojoinusintheparty.
whethertheenemyismarchingtowardsus.
二注意：
A表语从句一定要用陈述语序.
False:Thequestioniswhencanhearriveatthehotel.
Right:Thequestioniswhenhecanarriveatthehotel.
B不可以用if,而用whether连接表语从句(asif例外）.
引导宾语从句时可以互换if/whether位于介词后要用whether
位于句首时要用whether
引导表语从句,主语从句,同位语从句时要用whether
False:Thequestionisiftheenemyismarchingtowardsus.
Right:Thequestioniswhethertheenemyismarchingtowardsus.
Right:Itlookedasifhehadunderstoodthisquestion.
C不像宾语从句,在有表语从句的复合句中,主句时态和从句时态可以不一致.
Right:ThequestioniswhowilltravelwithmetoBeijingtomorrow.
Right:Thequestioniswhyhecriedyesterday.
Dthat在表语从句中不可以省掉.
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