2020高考英語一輪復習Unit 12
(2)if so
if so經常用來代替肯定的條件狀語從句，譯法較活。
(3)if not不然；要不
if not(不然；要不)代替否定的條件狀語從句。
(4)but for若不是，要不是
but for等于if it were not for...；if it hadn’t been for...，所在的句子常用虛擬語氣。
練：(1)—did you meet with the famous star?
—_______i had come here earlier.
a.only if b.if only c.but for d.as long as
提示:句意為:“你見到那個著名的明星了嗎？”“我要是早點來就好了。” 答話人表示遺憾，故選b。
答案:b
(2)look at the terrible situation i am in! if only i _______your advice.
a.follow b.would follow c.had followed d.have followed
提示:if only引導的句子中多用虛擬語氣，此處表示的是過去。
答案:c
辨析
1.believe,believe in
believe表示“相信某件事情或某人的話”。
believe in sb./sth.表示“相信某人或某物的存在”或“信賴；信任；相信某人會成功”。
即時練習:
(1)do you _______god?
(2)they need a leader they can _________.
(3)you can _______him this time but you’d better not ______him.
(4)don’t you _______what i say?
(5)people used to _______the earth was flat.
答案:(1)believe in (2)believe in (3)believe,believe in (4)believe (5)believe
2.power,strength,force
這三個詞都有“力量”之意。
power用法最廣，用于各種身的、心的、隱藏的、外顯的力量，也可指事物的某種作用力或動力。
strength指內部的能力，是身體組織內存在的體力。
force指運用或發揮出來的外在的、活動的力，含有克服阻力而使人或物按要求的方向運動之意。
即時練習:
(1)knowledge is_________.
(2)the boy lifted the stone with all his ________.
(3)she doesn’t have enough _______to walk upstairs.
(4)carrying this baggage requires a lot of _______.
(5)the ________of the wind knocked over a tree.
答案:(1)power (2)strength (3)strength (4)power (5)force
誘思：實例點撥
【例1】 （天津模擬） bill was doing a lot of physical exercise to build up his _____.
a.ability b.force c.strength d.mind