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1、PredicativeClauses表語從句表語從句的定義：表語從句在復合句中作主句的表語。表語從句和主語指同一內(nèi)容，它對主語進行解釋、說明，使主語的內(nèi)容具體化。結構是“主語+系動詞+表語從句”?？梢越颖碚Z從句的系動詞有be,look,remain,seem等。連接詞：連接代詞：連接副詞：that/whether/asif/asthoughwho/whom/whose/which/whatwhen/where/why/how/because1.Thequestionis__________wecanrelyonhim.2.That’s____________wewe
2、reinneedofmoneyatthattime.3.Helooked_________hewasgoingtocry.4.That’s________Iwaslate.whetherbecauseasifwhy引導詞的用法（一）that在表語從句中,又。Thefactisthathehasn’tyetrecoverfromillness.Thereasonwhyhehastogoisthathismotherisillinbed.既不充當成分沒有意義whether在表語從句中表,但不充當句子的成分。if引導表語從句.如:1.Whatthedoctorreally
3、doubtsiswhethermymotherwillrecoverfromtheseriousdiseasesoon.2.Thequestioniswhetheritisworthdoing.“是否”不能引導詞的用法（二）what在表語從句中充當______________表示____________________________.1.Thequestioniswhatcausedtheaccident.2.Thatmountainisnolongerwhatitusedtobe.3.Whathetoldyouwaswhathadbeendiscussedatt
4、hemeeting.主語、賓語或表語什么，什么樣子，或所…的（人或事）引導詞的用法（三）who在表語從句中充當______________表示____.Theproblemiswhocoulddothework2.Mytroubleiswho(whom)Icanturnto.主語、賓語或表語誰引導詞的用法（四）which在引導表語從句時,常充當_____________表示。如：Ireadaboutitinsomebookoranother,butwhatIdon’tknowiswhich(book)itis.定語,表語其中哪一個引導詞的用法（五）由asif,ast
5、hough引導表語從句，表示好像。句子中的系動詞常用look,appear,seem等。Itlooksasifitwasgoingtorain.2.Theyoungmanwithlonghairlooksasifhewereagirl.引導詞的用法（六）當主句的主語為reason,或者是由why引導的從句時,與它們相關的表語從句用_________,而不能由_______引導;because引導表語從句時只能用于________________________句型中.1.ThereasonwhyIwaslatewasthatImissedthetrain.2.Iwa
6、slate.It/That/ThiswasbecauseImissedthetrain.that來引導becauseIt/That/Thisis/wasbecause…引導詞的用法（七）當表語從句中主語、賓語、表語具備，但是還是要表示疑問含義，可以判斷句子中缺少狀語，常常用相應的特殊疑問詞引導，有why,when,where,how等Thisis_________hedidit.Thatis_______thebrotherswantedtomakeabet.That’s_______we’vegivenyoutheletter.引導詞的用法（八）howwhywhy
7、表語從句引導詞注意事項1.that引導表語從句時不能省.2.if不能引導表語從句.3.除that外的所有引導詞都有自己的意義。4.除that,whether外的所有引導詞都須在從句中充當相應的成分5.主語為advice、suggestion、order、command、reguest等時，表語從句為虛擬語氣Thesuggestionhegavemewasthateverymeans________________tosavethecropsbeforethestormcame.(try)他給的建議是，要在暴風雨來臨之前嘗試每一種方法來拯救這些莊稼。WhatIwa
