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詞、介詞短語、動詞不定式、分詞和從句等擔當。一般可分為九大類,分別表示時間、地點、原因、目的、結(jié)果、條件、讓步、比較和方式。條件狀語從句 ? 常用引導詞: if, unless, 特殊引導詞: as/so long as, only if, providing/provided that, suppose that, in case that, on condition that We’ll start our project if the president agrees. You will certainly succeed so long as you keep on trying. Provided that there is no opposition, we shall hold the meeting here. Practice ? 1. John shut everybody out of the kitchen ______he could prepare his grand surprise for the party. A. which B. when C. so that D. as if 2. I would appreciate it ________you call back this afternoon for the doctor’s appointment. A. until B. if C. when D. that 3. As far as I am concerned, education is about learning and the more you learn, ________. A. the more for life are you equipped B. the more equipped for life you are C. the more life you are equipped for D. you are equipped the more for life the war, a new school building was put up ________there had once been a theatre. A. that B. where C. which D. when 5. — Is Mr. Sm ith in the office? — Yes, ________ he is in charge of the office, he must be there. A. since B. however C. whether D. for 6. As you