The Smiths will live here for half a year. (表示他们现在还没有在这里居住) 如果需要表示瞬间动词的持续时间, 可以用 “It‘s 时间 + since…”的句子结构来表示. 如: It's 6 months since Tom came here. = Tom has been here for 6 months. 对于现在完成时不能望文生义，完成时在表示持续 动作时其实并未完成，动作尚未结束，还在持续之 中；而一般过去时的动作才是已经结束的动作。
3)表示最近发生的动作。常常与just, already, yet, still, recently等连用。
如: He has recently moved in here from New York. My car has just been repaired. Have you typed the letters already? She still haven't past her driving test.
注意：由于进行时表示的是正在发生的动作，因此， 表示状态、结果、情感、思维等的动词不可用于进 行时。这类动词有：
思维类：agree, appreciate, believe, consider（认为）, disagree, disbelieve, expect, feel, figure（美：捉摸）, find, get it（弄懂）, guess, hear, hear about, hear of, hope, imagine, know（知道）, realize, recognize, regard, see, see through, suppose, tell（辨 认）, think（认为）, understand, wonder, etc.
