1、现在完成时的构成 现在完成时的构成形式是 have/has+过去分词 。现在完成时常被称为 与现在有联系的过去 ,因此它不能与明确的过去时间状语连用。 Someonehasbrokenthewindow. 有人把窗户打破了。 2、现在完成时
It seems oil ___ from this pipe for some time. We'll have to take the machine apart to put it right. A) had leaked B) is leaking C) leaked D) has been leaking 从本题上下文看,这两个句子的意思是:“看来,这个管道漏油已有一段时间了,我们将不得不拆卸机器...
But Jane could think with certainty on only one point, -\- that Mr. Bingley, if he had been imposed on, would have much to suffer when the affair became public. “这的确叫人...
更多内容请点击：高考英语时态变化:现在完成时 推荐文章