题目内容
12．到目前为止，我已经用多种方法成功地算出那道数学题．I have successfully worked out/solved that maths problem in many ways so far．．分析 I have successfully worked out/solved that maths problem in many ways so far．
解答 答案：I have successfully worked out/solved that maths problem in many ways so far．这里的时间状语到目前为止so far与现在完成时连用have/has+过去分词，主语是I，故用have，算出用work out或者solve，故I have worked out/solved后直接加上宾语that math problem，加上副词 successfully 修饰worked out/solved，故I have successfully worked out/solved that maths problem，用多种方法用in many ways，故答案是I have successfully worked out/solved that maths problem in many ways so far．
点评 这里是现在完成时，它的时间状语有如since…，
for…； ever，never，recently（最近），today，this week （year），these days （weeks，years），in/during the last/past two years，so far等．
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