求助一道英语语法题
Notuntilyesterday________anythingabouttheprojectthatwillbecompletedsoon。A。didilearnB。...
Not until yesterday________anything about the project that will be completed soon。 A。did i learn B。have i learn 答案选B,但我不明白为什么不用A?帮我解释一些,谢谢
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其实这句话就是
i
have
not
learnt
anything
about
the
project
that
will
be
completed
soon
until
yesterday.
很显然要用晚场时态,看的时候有两个特点:
1.until
一般出现until就要开始考虑用完成时态了
2.be
completed
soon
这个project还没结束,所以我not
learning
anything的状态很可能一直持续,所以不可能用过去时态的
i
have
not
learnt
anything
about
the
project
that
will
be
completed
soon
until
yesterday.
很显然要用晚场时态,看的时候有两个特点:
1.until
一般出现until就要开始考虑用完成时态了
2.be
completed
soon
这个project还没结束,所以我not
learning
anything的状态很可能一直持续,所以不可能用过去时态的
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