情態(tài)動詞的意義和用法
病人一小時前吃的安眠藥,現(xiàn)在應(yīng)該睡著了。
it would be about ten when he left home.
他大約在十點鐘離開的家。
i thought he would have told you about it.
我認為他已告知你此事。
it would be raining when she went home.
她回家時可能正在下雨。
比較:
would you like ...表示邀請
do you like ...表示習(xí)慣
——do you like going go the cinema
你喜歡看電影嗎?
——yes,i go to the cinema a lot.
是的,我經(jīng)常去看電影。
——would you like to go to the cinema tonight
今天晚上去看電影好嗎?
——yes,i'd love to.
非常樂意。
e.shall和should
1.shall
①表示征詢意見或請求指示,用于一、三人稱疑問句。
shall i carry it for you
我來幫你搬它,好嗎?
shall we sing a song
我們唱一支歌,好嗎?
shall they wait outside
讓他們在外面等嗎?
shall the waiter bring meals to your room
要服務(wù)員把飯送到你房間去嗎?
提示:
shall i open the window
我打開窗子好嗎?
will you open the window
你打開窗子好嗎?
shall he open the window
他打開窗子好嗎?
②表示說話人的意愿,有“命令、允諾、警告、決心”等意思,用于第二、三人稱陳述句中。
you shall do as i say.
按我說的做。(命令)
he shall be sorry for it one day, i tell you.
我告訴你,總有一天他會后悔的。(警告)
you shall fall behind in your exam if you keep playing.
如果你一直玩,你就會在考試中落后。
nothing shall stop us from carrying out the plan.
什么也阻止不了我們執(zhí)行這項計劃。(決心)
he shall have the book when i finish reading.
我看完這本書就給他看。(允諾)
i shall do my homework after reading this story book.
讀完這本故事書后我就做作業(yè)。
2.should
①表示義務(wù),意為“應(yīng)該”(某件事宜于做),用于各種人稱。
children should obey their parents.
兒童應(yīng)該服從他們的父母。
one shouldn't be selfish.
人千萬別自私。
customers who get bad service should complain, shouldn't they
沒有得到滿意服務(wù)的顧客應(yīng)該抱怨,不是嗎?
②常與what, how, why等詞連用,表示意外、驚訝等情緒。
how should i know
我怎么會知道呢
why should i fear
我為什么會害怕?
what should she do but cry for help