The widely accepted big bang theory holds that the
universe began in an explosive instant ten to twenty
billion years ago and has been expanding ever since.
(A) that the universe began in an explosive instant
ten to twenty billion years ago and has been
expanding
(B) that the universe had begun in an explosive
instant ten to twenty billion years ago and had
been expanding
(C) that the beginning of the universe was an
explosive instant ten to twenty billion years ago
(D) the beginning of the universe to have been an
explosive instant ten to twenty billion years ago
that is expanding
(E) the universe to have begun in an explosive
instant ten to twenty billion years ago and has
been expanding
E的错误说是：“to have begun”"has been expanding"要parallel。
那 to have begun这个用法是对的吗？可以这样用吗？作者: soojin3215 时间: 2011-8-12 19:59
我只见过一次就是be known to have done。是有特殊含义的，表明have done的行为在be known之前发生的。
其他时候没见过。：“to have begun”"has been expanding本身不平行。OG的意思应该是，and前后句子要平行，后面是完整句子前面也应该有谓语，而不能用不定式作者: bennywang 时间: 2011-8-13 09:10
恩，谢谢。我想成那要平行，是不是可以都改成 to have done这个形式。在这里 the universe to have begun in ...应该是不可以的吧？作者: soojin3215 时间: 2011-8-14 07:49
