take place of對么?謝謝了
take place of對么?謝謝了
take place:發(fā)生= happen; occur
take the place of:代替= replace,substitute
instead of代替---但是介詞短語
疑問句,倒裝句,否定句的助動詞是什么?
什么是助動詞?
1)協(xié)助主要動詞構(gòu)成謂語動詞詞組的詞叫助動詞(Auxiliary Verb)。被協(xié)助的動詞稱作主要動詞(Main Verb)。
助動詞自身沒有詞義,不可單獨使用,例如:
He doesn"t like English. 他不喜歡英語。
(doesn"t是助動詞,無詞義;like是主要動詞,有詞義)
2) 助動詞協(xié)助主要動詞完成以下功用,可以用來:
a. 表示時態(tài),例如:
He is singing. 他在唱歌。
He has got married. 他已結(jié)婚。
b. 表示語態(tài),例如:
He was sent to England. 他被派往英國。
c. 構(gòu)成疑問句,例如:
Do you like college life? 你喜歡大學(xué)生活嗎?
Did you study English before you came here? 你來這兒之前學(xué)過英語嗎?
d. 與否定副詞not合用,構(gòu)成否定句,例如:
I don"t like him. 我不喜歡他。
e. 加強語氣,例如:
Do come to the party tomorrow evening. 明天晚上一定來參加晚會。
He did know that. 他的確知道那件事。
助動詞be、have和do用法
Be動詞的用法
(1) 助動詞be和現(xiàn)在分詞一起構(gòu)成進(jìn)行時或完成進(jìn)行時。如:
He is reading. 他在讀書。
I"ll be waiting for you there then. 我到時在那兒等你。
(2) 助動詞be和過去分詞一起構(gòu)成被動語態(tài)。如:
Is he taken good care of? 他被照顧得好嗎?
They shall be punished. 他們一定要受懲罰的。
(3) 助動詞be用作系動詞。如:
Matthew is a teacher. 馬修是個老師。
We were late today. 我們今天遲到了。
(4) 助動詞be和不定式連用,可以表示下面幾種情況。
表計劃,只用于肯定句和疑問句。如:
We are to discuss it the following week.
我們打算下周討論那件事。
When is the wedding to be? 婚禮什么時候舉行?
表命令,只用于肯定句和否定句。如:
All junior officers are to report to the colonel at once.
全體下級軍官都必須立即向上校報到。
Tom says I am to leave you alone. 湯姆要我不理會你。
表可能,多用于被動結(jié)構(gòu)。如:
Her father was often to be seen in the bar of this hotel.
在這家旅館的酒吧經(jīng)常可見到她父親。
Where is he to be found? 在哪兒可找到他?
表示“必須”,“應(yīng)該”多用于現(xiàn)在式。如:
Nobody is to leave this room. 誰也不許離開這個房間。
What am I to do next?下一步我該做什么?
He"s to blame. 該怪他。
表注定,多用于過去式。如:
He was to be my teacher and friend for many years to come.
在后來許多年里,他是我的老師和朋友。
The professor did not know at the time that he was never to see his native place again.
當(dāng)時教授不知道他再也見不到他的故土了。
(5) 助動詞be用于條件從句。如:
If we are to succeed, we must redouble our efforts.
我們要想成功,必須加倍努力才行。(are to意為“想要”)
(6) be后接going to, about to, on the point of等表示將來時間或根據(jù)計劃、意圖等將要發(fā)生的事。如:
It"s going to rain. 快要下雨了。(將來時間)
He"s about to leave. 他正要走。(將來時間)
Have的用法
(1) 助動詞have與過去分詞一起構(gòu)成各種完成時態(tài)。如:
I have read the book. 我讀過這本書。
Kenny has left. 肯尼已經(jīng)走了。
(2) 助動詞have與been+現(xiàn)在分詞構(gòu)成各種完成進(jìn)行時態(tài)。如:
I have been washing the clothes the whole morning.
整個上午我都在洗衣服。
Lambert has been working as a worker here for nearly five years.
蘭伯特一直在這里當(dāng)工人,幾乎有五年了。
(3) 助動詞have構(gòu)成had better, had best, had rather等詞組。
Had better和had best是“最好還是……”或“還是……好”的意思。在had better中,had不表示過去時間,不能用have或has代替。had better 后可接不帶to的不定式或接進(jìn)行式、完成式或被動語態(tài)。had better的否定式是had better not。如:
You had better stay at home.你最好呆在家里。
You"d better have had that experience before.
假如你以前有過那個經(jīng)驗就好了。
You"d better not run the risk. 你最好不要冒那個險。
(4) 補充
Have還可用作使役動詞和實義動詞(表示”有”,”吃”等意義)。如:
They have had the problem solved.
他們讓其他人解決了這個問題.(使役動詞)
Bad news has wings. 丑事傳千里. (實義動詞)
What shall we have for lunch? 我們午飯吃甚么? (實義動詞)
Do的用法
(1) 助動詞do, does和did用于構(gòu)成否定句、疑問句和倒裝句。如:
Do you understand all this? 你明白這一切嗎?
Don"t go yet. 先別走。
(2) 助動詞do, does和did用于代替句中的主要動詞,以避免重復(fù)。如:
He didn"t go to the party. Neither did I. 他沒有去參加晚會,我也沒有去。
I do not agree. Nor does he. 我不同意,他也不同意。
(3) 用于加強語氣, do, does和did位于陳述句的動詞原形前, do位于祈使句中的動詞原形前。如:
Do have another cup of coffee before you go.
走前請一定再喝一杯咖啡。
That"s exactly what he did say. 他就是那樣說的。
But I do want to go. 可是我確實想去。
(4) 在一些以否定副詞如never, rarely, scarcely, only等為首的句子中,如果實義動詞是現(xiàn)在時或過去時,助動詞do和did可以構(gòu)成主謂倒裝。如:
Never did I tell him about that. 我從來沒有告訴過他那件事。
Rarely does it snow in the South. 南方很少下雪。