Question

4．从上个月起，那个新博物馆已经投入使用．The new museum has been in use since last month．．

Answer 1

分析 The new museum has been in use since last month．

解答 答案：The new museum has been in use since last month．
句中的投入使用come into use发生在过去，已经持续了一段时间，用现在完成时have/has+过去分词，主语是the new museum三单，故用has，come into use是短暂性动词短语，需换成状态be in use，be的过去分词been，故The new museum has been in use，时间状语since last week从上月起，故答案是The new museum has been in use since last month．

点评 现在完成时表示过去发生或已经完成的动作对现在造成的影响或结果，或从过去已经开始，持续到现在的动作或状态． 时间状语：recently，lately，since…for…，in the past few years，etc．基本结构：have/has+done  否定形式：have/has+not+done．