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.
10. The widelyacceptedbigbang 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 that has expanded
(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
C,E选项出现了to have been 和to have begun 这种不定式短语。我的问题是这种短语可以作为句子的谓语或者系动词吗? 我觉得to have been 更像是定语,相当于that从句。 但og的解释是
E The verb phrasesto have begunandhas been expandingboth reference the same subject of the clause,universe, and therefore need to be parallel. 如果是这样的话,那么to have begun就是谓语动词了? 求各位大牛,指点迷津。