高考英語考點(diǎn)：時(shí)態(tài)考點(diǎn)歸納與分析
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一、現(xiàn)在完成時(shí)考點(diǎn)
現(xiàn)在完成時(shí)主要有兩種用法，即持續(xù)性用法(或叫未完成用法)和影響性用法(或叫已完成用法)。持續(xù)性用法表示動(dòng)作發(fā)生于過去，但在過去并未完成，而是從過去一直持續(xù)到現(xiàn)在，此時(shí)多半會(huì)連用表示持續(xù)性的時(shí)間狀語;后者指的是動(dòng)作發(fā)生于過去，且在過去已經(jīng)完成，但這個(gè)過去發(fā)生的動(dòng)作對現(xiàn)在有影響，而說話者正好要強(qiáng)調(diào)的就是這個(gè)影響，此時(shí)一般沒有明顯的時(shí)間狀語，主要通過上下文來理解。如：
1. Years ago we didn’t know this, but recent science _________ that people who don’t sleep well soon get ill. (廣東卷)
A. showed B. has shown C. will show D. is showing
【分析】答案選 B。由表示對照的Years ago和recent可知，“以前不知”，但“現(xiàn)在已經(jīng)證明了”，所以用現(xiàn)在完成時(shí)。
2. He was hoping to go abroad but his parents _________ that they won’t support him unless he can borrow money from the bank. (湖北卷)
A. were deciding B. have decided C. decided D. will decide
【分析】答案選B。因賓語從句中的時(shí)態(tài)是一般將來時(shí)，主句中的謂語動(dòng)詞不可能是過去時(shí)態(tài)，排除選項(xiàng)A和C;由語境判斷，不是“將要決定”，而是“現(xiàn)在已經(jīng)決定”，所以排除D，而選B。
另外，同學(xué)們還要特別注意以下這些習(xí)慣上要與現(xiàn)在完成時(shí)連用的短語和句型：so far(到目前為止)，since(自從)，in [for, during] the past [last]…years(在過去…年中)，by now (到現(xiàn)在為止)，up to [until] now (到現(xiàn)在為止)，It's [will be] the first time that…(第一次……)等。如：
3. My brother is an actor. He _________in several film so far. (浙江卷)
A. A. appears B. appeared C. has appeared D. is appearing
【分析】答案選 C。so far(到目前為止)通常與現(xiàn)在完成時(shí)連用。
4. The country life he was used to _________ greatly since 1992. (山東卷)
A. change B. has changed C. changing D. have changed
【分析】答案選 B。since 1992這類時(shí)間狀語通常與現(xiàn)在完成時(shí)連用。主句主語是the country life，句中he was used to是省略了關(guān)系代詞that的定語從句。
二、過去完成時(shí)考點(diǎn)
過去完成時(shí)是一種相對時(shí)態(tài)，即以某一過去時(shí)間作參照，過去完成時(shí)表示的動(dòng)作發(fā)生在這一過去時(shí)間的更過去，所以我們可以簡單地用“過去的過去”這五個(gè)字來理解過去完成時(shí)態(tài)。如：
1. He _________more than 5,000 English words when he entered the university at the age of 15. (北京卷)
A. has learned B. would have learned C. learned D. had learned
【分析】答案選 D。因?yàn)樯洗髮W(xué)是過去，學(xué)了五千個(gè)英語單詞是在上大學(xué)之前，即“過去的過去”，所以用過去完成時(shí)。
2. When the old man _________ to walk back to his house, the sun _________ itself behind the mountain. (湖北卷)
A. started; had already hidden B. had started; had already hidden
C. had started; was hiding D. was starting; hid
【分析】答案選 A。根據(jù)句意，“開始回房子”發(fā)生在過去，“太陽落山”是在“開始回房子”之前，故過去的過去。
3. Father _________for London on business upon my arrival, so I didn’t see him. (福建卷)
A. has left B. left C. was leaving D. had left
【分析】答案選 D。根據(jù)“我沒見到他”可知，“在我到達(dá)”前“父親已經(jīng)去倫敦”了，即父親去倫敦發(fā)生在“過去的過去”，故用過去完成時(shí)。
(責(zé)任編輯：郭峰)
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