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高一英語:知識(shí)點(diǎn)總結(jié)Unit11-12(16)

2016-11-24 13:26:54 來源:高考網(wǎng)

   4. If only they could find a way to get to the room,

  behind the wall.

  要是他們能找到辦法到達(dá)墻后面的房間,那就好了。

  if only雖然是從屬連詞,但它引導(dǎo)的從句卻能單獨(dú)

  成句,且能表達(dá)完整的意思:要是……該多好 --

  種不能實(shí)現(xiàn)或難以實(shí)現(xiàn)的愿望。它相當(dāng)于wish,但

  語氣更強(qiáng)。句后用句號(hào)或感嘆號(hào)皆可。

 、 表示已過去了的不能實(shí)現(xiàn)的愿望,常含有后悔、惋

  惜之意。謂語動(dòng)詞應(yīng)使用had done形式。

  If only I had taken his advice!

  要是我聽從了他的建議就好了!

 、 表達(dá)現(xiàn)在不可實(shí)現(xiàn)的愿望,謂語動(dòng)詞用一般過去

  時(shí)。

  If only I could swim!

  我要是會(huì)游泳該多好!

 、 表達(dá)將來難以實(shí)現(xiàn)的愿望,謂語動(dòng)詞用would /

  could + 動(dòng)詞原形或一般過去時(shí)。

  If only she would help me!

  要是她能幫我就好了。

  [注意] if only 除以上用法外,它還相當(dāng)于if,引導(dǎo)條

  件狀語從句。

 、 If only he gets the job, it will make a great deal of

  difference.

  要是他能得到這份工作,情況就大不一樣了。

  [辨析] if only與only if

  if only 多用于虛擬語氣;only if 多用于陳述語氣,

  only 修飾 if,表示惟一的條件。

  5. He was just about to say something when Peter turned

  around.

  他正要說些什么,這時(shí)皮特轉(zhuǎn)過身來。

  be about to do sth. 正要做某事,表示該動(dòng)作馬上就

  要進(jìn)行,不能與時(shí)間狀語連用。

  [誤] He was about to leave in five minutes.

  [正] He would leave in five minutes.

  他5分鐘后離開。

  when 在此表示“正在這時(shí) / 那時(shí),突然”(具體用法詳

  見Chapter 1“詞匯短語”)

  6. It looked as if the creature had moved.

  塑像好像動(dòng)了。

  as if / though 仿佛,好像(引導(dǎo)表語/方式狀語從句,

  表示與事實(shí)相反的情況時(shí)用虛擬語氣)

  (1) 引導(dǎo)表語狀語從句

  It looks as if it is going to rain.

  看來好像要下雨了。(真的要下雨了。)

  (2) 引導(dǎo)方式狀語從句

  He talks as if he were / was an expert.

  他說話的樣子好像是個(gè)專家似的。(事實(shí)上他不是

  專家。)

  (3) As if / though 引導(dǎo)的從句中若用虛擬語氣,其謂

  語動(dòng)詞分別是:

  表示與現(xiàn)在事實(shí)相反:did / were (口語中單數(shù)也用

  was)

  when a pencil is partly in water, it looks as if it were /

  was broken.

  表示與過去事實(shí)相反:had done

  He is talking as though he had been to Beijing many

  times.

  表示與將來事實(shí)相反:could / would do

  He acts as if he would fly to the moon tomorrow.

  (責(zé)任編輯:康彥林)

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