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SBⅠUnits 17-18 重点句型 1. Another journey of challenge and danger was about to begin. (SBⅠ U17) 又一次富有挑战和危险的旅程就要开始了。 be about to do sth.表示“正要(即将)做某事”(不与表示将来的时间状语连用)。经常与when 搭配，这种结构也可以换成be on the point of doing sth.… when… I was about to start out when it began to rain. 我正要出发，就在这时天开始下雨了。 We were about to start out when the headmaster stopped us. 我们正要出发，就在这时校长拦住了我们。 will/shall, be going to, be to 也可表将来；be going to表示即将发生或准备好做某事；be to表示约定、职责、义务、可能性等，有命令、指令和要求之意。 ①I ______________(正准备看) your composition. ②When he ______ (正要开)the door, he found his keys were nowhere.(2009·湖南卷改编) 【答案】 ①was about to read ②was to open 2. On the third day I was struggling through stormy weather and during the next week the wind grew stronger and I found myself spending a whole day in my tent. (SBⅠ U17) 第三天我在风暴中挣扎，第二周风刮得更猛了，我发现自己终日在帐篷里。 | 
