九年級英語上冊重點(diǎn)知識梳理1
如果我?guī)уX了,我就會借給你些。(事實(shí):沒帶錢)
if he studied harder, he might pass the exam.如果他在努力些,就能通過考試了。(事實(shí):學(xué)習(xí)不用功)
②表示與過去事實(shí)相反的情況
從句謂語動詞形式 主句謂語動詞形式
had+過去分詞 should/would/could/might+have+過去分詞
eg if i had got there earlier, i should/could have met her.
如果我早到那兒,我就會見到她。(事實(shí):去晚了)
if he had taken my advice, he would not have made such a mistake.
如果他聽我的勸告的話,就不會犯這樣的錯誤了。(事實(shí):沒有聽我的話)
③表示對將來情況的主觀推測(可能相反或可能性很小)
從句 例句 主句
① were
if+主語 ② did
③were to do
(①通常與一個表示時間狀語連用)其 中were to do可能性最小,
should+動詞原形。 if it rained tomorrow our picnic
would be put off.
萬一那天下雨,我們的郊游
就推遲。
should/would do might
主句 /could
eg: if he would come here tomorrow, i should/would talk to him.
如果他哪天來這兒的話,我就跟他談?wù)劇#ㄊ聦?shí):來的可能性很小)
if there were a heavy snow next sunday, we would not go skating.
如果下周日下大雪,我們就不能去滑冰了,(事實(shí):不知能否下雪)
if she were to be there next monday, i would tell her about the matter.
如果她下周一來這兒的話,我就會告訴她這件事得始末。
四、虛擬語氣的其他用法
1、虛擬語氣用在wish 后的賓語從句
a、表示與現(xiàn)在事實(shí)相反的愿望,謂語動詞用過去式
eg: i wish i had your brains.我希望我有你那樣的頭腦。(事實(shí):我根本比不上你)
b、表示過去事實(shí)相反的愿望,謂語動詞:had+v-ed
eg: i wish i had known the truth of the matter.我希望我原來知道這件事的真相。(事實(shí):原來不知道)
c、表示將來難以實(shí)現(xiàn)的愿望
謂語動詞:should/would + 動詞原形
eg: i wish i should have a chance again.很難再有這樣的機(jī)會了。(事實(shí):很難再有這樣的機(jī)會了)
②虛擬語氣用在suggest(建議)、insist(堅持)、demand(要求)、order(命令)等動詞后的賓語從句中。
在這種用法中,無論主句謂語動詞為何種時態(tài),從句的謂語動詞都用:“should + 動
詞原形”或只用“動詞原形”。
如 he suggested
he insisted
he demand that we (should) take the teacher’s advice
he ordered
unit 5
一、知識點(diǎn):
1、情態(tài)動詞表示推測:
(1)must常用于肯定句中,意為“準(zhǔn)是、一定”,它表達(dá)的肯定程度最大,可以達(dá)到100%。
(2)could、might、may的意思是“可能、也許”,表示推測,它們所表達(dá)的肯定程度較低,這三個詞相比may的可能性稍大一些;他們的肯定程度在20%至80%。
(3)can’t的意思之“不可能”,它相應(yīng)的肯定形式是must;它的可能性為0% 。