I know Mr Brown, we------to each other at an internation conference. A have been introduced B were

Question

I know Mr Brown, we------to each other at an internation conference. A have been introduced B were introduced 我不知道问什么答案选B，我觉得他们既然是以前被介绍认识的，就是以前发生的事情对现在事情造成的结果。不是应该用现在完成时吗？ I -----to a part ,but I've got nothing to wear. Why don't you have a dress made for the part? A was asked B have been asked 这一题同样是分清是该用什么时态，怎么确定用哪种时态

Answer 1

know
Mr
Brown,
we------to
each
other
at
an
internation
conference.
A
have
been
introduced
B
were
introduced
B正确。原因如下：楼主你说他们既然是以前被介绍认识的，就是以前发生的事情对现在事情造成的结果。你看到句子中有说对现在产生什么结果了没有？他只是在讲述事实而已，因此不必要用完成时。
I
-----to
a
part
,but
I've
got
nothing
to
wear.
Why
don't
you
have
a
dress
made
for
the
part?
A
was
asked
B
have
been
asked
答案a
很简单，把句子分开来
I
-----to
a
part
I've
got
nothing
to
wear
上面你说了完成时表达的意思：对现在产生的影响。如果2个分句都用现在完成时，是哪个句子对现在产生影响？对不对？
换一个角度思考：下面的回答是：为什么你不为聚会订做一件礼服呢？显然，这个对应得是I've
got
nothing
to
wear（对现在的影响）所以前面的那一句话就不可能用完成时了
再换一个角度：从句子的意思下手
：我被邀请参加一次聚会，但是现在我还没到什么合适的衣服穿.
-
-
-
为什么你不为聚会订做一件礼服呢？
将选项AB代入空格处，哪一个翻译顺？明显是A
这样解释清楚么？
以后还有什么关于语法的问题找我吧，我会尽力为你解答问题。
如果楼主你觉得我讲的东西对你有用，请给个好评吧。谢谢了~~GL