在解题过程中,我发现同学们存在着一个突出问题:容易受“思维定势”的影响,因而对变化了的题目未能灵活应变,结果造成了失误。本文希望通过下面六个实例的评析,帮助同学们“解放思想”,摆脱这种“思维定势”的影响。 1. ______ they are to be included in the plan will depend on ______ they are true. A. If; if B. Whether; whether C. If; whether D. Whether; if 一般说来,在宾语从句中,whether常可与if互换。例如:I don’t know if / whether I can help you.但在下面情况下,只用whether: 1) 在介词后。2) 用于带to的不定式前。3) 引出主语从句,表语从句,同位语从句和让步状语从句。4) 用于whether ... or not中。故本题选B。 2. ______ the early morning of May Day he left for Shanghai. A. On B. At C. In D. By 一般说来,在in the morning / evening / afternoon, at noon, at night等短语中,如果有前置定语或后置定语时,要将介词at / in改为on。例如:on a hot evening of July, on a cold night等。故本题选A。 3. They don’t think you two have met before, ______? A. do they B. don’t they C. have you D. haven’t you |