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[例句]
-We have all worked hard these days.
-So we have.(的确如此)
I promised to help him, and so I did.(我确实帮助他了)
[比较2] "主语 + 助动词 + so" 表示按照别人的要求去做
[例句]
The wounded little boy asked me to lift him up and I did so.
The doctor asked Charlie to breathe deeply and he did so.
句型23
It was + 时间段+before…."过了多久才(怎么样)……"
It was not long before…."不久，就……"
It will (not) be +时间段+before…."要过多久(不久)……才……"(before从句谓语动词要用一般时态)
[例句]
It was not long before he sensed the danger of the position.不久他就意识到他处境的危险。
It was five days before he came back. 五天后他才回来。
It will be half a year before you graduate from the school. 再过半年你才能毕业。
It will not be long before they understand each other. 他们大概不久就会互相了解。
句型24
It's strange/surprising/a pity/a shame/a surprise (that) … should do…should表示“竟然”
[例句]
It's a pity that she should miss the chance. 很遗憾她错过了机会。
It's really surprising that a prophecy(预言)should coincide with the fact so exactly. 令人惊讶的是，预言和事实竟然如此巧合。
It's strange that he shouldn't pass the exam. 奇怪的是他竟然没有通过考试。
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