文档介绍：一、That可以做副词,代词,形容词和连词,但是做连词时是最常见的,也是最难鉴别的,that用作连词,引导名词性从句,状语从句和强调句 。①引导宾语从句。及物动词后的引导词that可省略。 Ididn'texpect(that)hecouldwinthechampionship. TheteacherpointedoutthatTomwasnotworkinghardenough. ②引导主语从句。通常采用it作形式主语的句型。 Thattheearthgoesaroundthesunisknowntoeveryone. (hattheearthgoesaroundthesun.) ③引导表语从句。 Thetroubleisthatweareshortofmoney. ④引导同位语从句。引导同位语从句的that和引导定语从句的that是不同的。前者只起语法作用,在从句中不作任何成分;而后者在定语从句中作主语、宾语或表语。举例说明: Thenewsthatheresignedfromofficesurprisedus. monnowadaysoncampus. ①引导目的状语从句。 BringitnearerthatImayseeitbetter. ②引导结果状语从句。 hatheshouldbesoangrywithme? ③引导原因状语从句。 IamafraidthatIwillfailinthedrivingtest. ④引导让步状语从句。意为“虽然、尽管”。 Difficultthat/asthetaskwas,plishitontime. ⑤引导条件状语从句。意为“假使、假设”。 Supposingthatyouwereinmyposition,whatwouldyoudo? Onconditionthatyouwerelostinthedesert,youshouldaskforhelpassoonaspossible. 。 ,nothermeeklittlehusband. Itisanillwindthatblowsnobodygood. 附加:that引导定语从句(做关系代词) Ishethemanthatwantstoseeyou? eunwrapped. 二、While可以做名词和连词,做连词时又可分为从属连词和并列连词做从属连词可以引导时间状语从句,让步状语从句,条件状语从句, (1)引导时间状语 We must strike while the iron is 。(2)引起让步状语从句,意思是“虽然…但是…。”、“尽管…但是…”(多放于句首) While he loves his students,he is very strict with them.。虽然他爱他的学生,可是他对他们很严格。(3)引起条件状语,意思是“只要” While there is life there is hope. 只要生命存在