要參加考試的同學(xué)們，小編為大家提供“2019中考英語(yǔ)：情態(tài)動(dòng)詞重點(diǎn)疑難”供您參考，本網(wǎng)站將實(shí)時(shí)更新更多相關(guān)資訊，請(qǐng)不要錯(cuò)過(guò)。感謝大家瀏覽本頁(yè)面，更多資訊請(qǐng)關(guān)注我們網(wǎng)站的更新。
2019中考英語(yǔ)：情態(tài)動(dòng)詞重點(diǎn)疑難
情態(tài)動(dòng)詞重點(diǎn)疑難
一.need和dare的用法
need和dare既可用作情態(tài)動(dòng)詞，也可用作實(shí)義動(dòng)詞。用作情態(tài)動(dòng)詞時(shí)，主要用于否定句和疑問(wèn)句。用作實(shí)義動(dòng)詞時(shí)，可用于各種句式。
1.用作情態(tài)動(dòng)詞
--Need I come? --Yes, you must. --我需要來(lái)嗎? --需要。
You needn′t telephone him now. 你現(xiàn)在不必打電話給他。
I don′t think you need worry. 我想你不必發(fā)愁。
She dare not go out alone at night. 她晚上不敢一個(gè)人出去。
How dare you say I′m unfair? 你竟敢說(shuō)我不公平?
Not one of them dared mention this. 他們誰(shuí)也不敢提這件事。
2.用作實(shí)義動(dòng)詞
You don′t need to do it yourself. 你不必親自做這件事。
We need to tell them the news. 我們需要把這消息告訴他們。
We should dare to give our own opinion. 我們要敢于提出自己的觀點(diǎn)。
He did not dare (to) look up. 他不敢抬頭看。
I dare say he′ll come again. 我想他會(huì)再來(lái)的。 (cI dare say…為固定習(xí)語(yǔ))
二、情態(tài)動(dòng)詞幾組詞的辨異
1. can 和be able to
1)情態(tài)動(dòng)詞can只有兩種時(shí)態(tài)形式，現(xiàn)在式can和過(guò)去式could，而be able to有多種時(shí)態(tài)形式。
Mary can play the piano. She has been able to play it since she was 5.
瑪麗會(huì)彈鋼琴。她五歲起就會(huì)彈了。
2)用在過(guò)去時(shí)中，could經(jīng)常表示能夠做某事，事實(shí)上不一定去做，而was∕were able to則表示“過(guò)去做成了某事”。在否定句中兩者可通用。
He could swim across the English Channel. But he didn′t feel like it that day.
他能游過(guò)英吉利海峽，但那天他不想游。
Yesterday I was able to get home before the heavy rain. 昨天我在下大雨前趕到了家里。
2. must和 have to
must表示主觀意志，而have to表示由于客觀因素不得不做某事。must沒(méi)有過(guò)去式，除在間接引語(yǔ)中可用于表示過(guò)去時(shí)間，在直接引語(yǔ)中表示過(guò)去時(shí)間應(yīng)該用had to代替。
I told her that she must give up smoking. 我叫她必須戒煙。
We had to get everything ready that night. 我們那晚得把一切準(zhǔn)備就緒。
3. would和used to
1)used to表示過(guò)去與現(xiàn)在或過(guò)去某時(shí)與后來(lái)的情況有不同，而would只表過(guò)去的情況。People used to think that the earth was flat.
過(guò)去人們認(rèn)為地球是平的。(現(xiàn)在人們不這么認(rèn)為。)
She would go out for a walk in the morning when she was in the country.
在鄉(xiāng)下時(shí)，她總是在早晨去散會(huì)兒步。(可能現(xiàn)在仍有散步的習(xí)慣。)
2)used to可表示過(guò)去的習(xí)慣動(dòng)作和經(jīng)常的情況，而would只表示過(guò)去的習(xí)慣動(dòng)作。
He used to ∕would smoke while writing. 過(guò)去他寫東西時(shí)常抽煙。
She used to be fat. 她過(guò)去很胖