it的用法高三英语课件

非人称代词itIt用于代替指示代词，Isn’titawful!Itdoesn’tmatter?it有时并不指具体东西，而指天气，It可以表示“是谁（在某处或做某事）”“Who’sthat?”“It’sme”It’syourmotheronthephone“Why，环境，时间，距离等，称为非人称代词itIt’srainingIt’sTuesdaytodayIt’squiethereIt’stwomilestothebeach形式主语it有下面几种类型：Be+形容词+不定式eg:It’sbettertobeearlyBe+名词+不定式eg:ItwashisdutytotakecareoftheorphansBe+介词短语+不定式eg:It’sbeyondmetosaywhyIt+及物动词+宾语+不定式eg:ItmakesmesicktothinkaboutitBe+名词+动名词eg:It’snogoodstandinghereinthecoldBe+形容词+动名词eg:It’shelplesstryingtoadvisehertodoso其他结构+动名词eg:Itdoesn’tmatterwaitingafewmoredays用于由that引导的主语从句，it’syou!”shecried?It还可以用来泛指某件事，有下面几种类型：it+be+形容词+that从句：eg:Itisnaturalthattheyshouldhavedifferentviewsit+be+名词+that从句:eg:It’sashamethatyou’resickit+动词（+宾语）+that从句eg:Ithappenedthatshewasn’tinthatdayEg2:ItneveroccurredtomethatperhapsshewaslyingIt+动词的被动语态(said/believed/thought/expected/reported/known+that从句eg:It’ssaidthattherehasbeen，