Re: Correct the errors II

Posted by Rachel on 2006/9/19 11:44:20

Kathy,

Please refer to Teacher Big's explanation:

雖然Elinor所引據的B用法是存在的, 也可以接受, 但就較廣泛通俗的用法而言, since在作「自從」之意思時其從屬子句動詞仍是以過去簡單式為多, 尤其在考試時通常以過去簡單式為標準答案, 同學們請加以注意.

因此我認為這樣寫較為妥當:
There have been more than forty presidents of the United States since it became a country.

Rachel加註 : 由since所連接的主要子句通常用現在完成(進行)時式或過去完成(進行)時式