有一读者问能不能说：
(1)People have gone to the moon and come back to earth again.
如果能的话，那么下面两个句子也是对的吗？
(2)They have gone to Shanghai and come back again.
(3)I have bought a pen but have lost it.
你所举的（1）、（2）、（3）例都是正确的英语。这种现在完成时与另一现在完成时连用并一起完成的情况颇为常见，也并不难学。再如：
(4)She's been married and divorced.
(5)The river has been a scourge to China. But we have tamed it at last.
(6)Why! He has only just gone. What has brought him back so soon?
从上述六例可以看出我们不仅可以用现在完成时完成一个动作，也可以用它接连完成两个动作。
