:
—Really ? When _____ there ?
Ａ. will they go Ｂ. did they go
Ｃ. do they go Ｄ. have they gone
例2.—______ you ___ your homework yet ?
—Yes . I _____ it a moment ago .
Ａ. Did ; do ; finished Ｂ. Have ; done ; finished
Ｃ. Have ; done ; have finished Ｄ. will ; do ; finish
简析：现在完成时与一般过去时容易混淆，就是因为它们所表示的动作都发生在过去，但二者又有区别：一般过去时表示过去某个时间发生的事、存在的状态或经常发生的动作，说话的侧重点在于陈述一件过去的事情，与现在没有关系；现在完成时表示与现在有关系的发生在过去的动作，它不与表示过去的时间状语（如yesterday , last week , a moment ago等）连用。故例１、２的正确答案皆为B。
考点四：考查非延续性动词的用法
例1. His father ______ the Party since 1978 .
Ａ. joined Ｂ. has joined Ｃ. was in Ｄ. has been in
