the teacher asked the students( ).a.whether they had ever seen the film avatar two months agob;that they had ever seen the film avatar two months beforec;if they had erer seen the film avatar two monrhs befored;whether they have ever seen the film av
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![the teacher asked the students( ).a.whether they had ever seen the film avatar two months agob;that they had ever seen the film avatar two months beforec;if they had erer seen the film avatar two monrhs befored;whether they have ever seen the film av](/uploads/image/z/12735046-46-6.jpg?t=the+teacher+asked+the+students%28+%29.a.whether+they+had+ever+seen+the+film+avatar+two+months+agob%3Bthat+they+had+ever+seen+the+film+avatar+two+months+beforec%3Bif+they+had+erer+seen+the+film+avatar+two+monrhs+befored%3Bwhether+they+have+ever+seen+the+film+av)
the teacher asked the students( ).a.whether they had ever seen the film avatar two months agob;that they had ever seen the film avatar two months beforec;if they had erer seen the film avatar two monrhs befored;whether they have ever seen the film av
the teacher asked the students( ).a.whether they had ever seen the film avatar two months ago
b;that they had ever seen the film avatar two months before
c;if they had erer seen the film avatar two monrhs before
d;whether they have ever seen the film avarar two month before
the teacher asked the students( ).a.whether they had ever seen the film avatar two months agob;that they had ever seen the film avatar two months beforec;if they had erer seen the film avatar two monrhs befored;whether they have ever seen the film av
C
if they had ever seen the film Avatar two months before.
第一,这是个过去的过去的时态,因此用过去完成时.
第二,完成时不与表示时间的点的词ago连用,而改为表示时间段的词before