※ 引述《neversayyes (亲爱的你)》之铭言：
: My daughter ____ her homework since 3 p.m. when I got home.
: 整个句子显得很不自然很怪XD
没错!整个句子显得很不自然很怪!
台湾就是有一堆奇怪的英文老师，连简单通顺的句子都写不出来，
还老是想出一些怪考题，来考学生进阶的文法。
My daughter has (already) done her homework.
My daughter has been doing her homework since 3 p.m.
When I got home (at 5 p.m.), my daughter was doing her homework.
She had been doing her homework since 3 p.m.
When I got home, my daughter did her homework.
(I got home, and then my daughter did her homework.)