always 是频度副词老师说，频度副词一半用于现在时，怎么能用在过去十呢？

你们老师说的不对，always几乎可以用于任何时态，包括现在/过去完成时，一般现在/过去/进行时，甚至还有将来时。以下例句出自Longman Dictionary of Contemporary English, 应该比你们老师权威了：

1
all the time, at all times, or every time
Always lock your bicycle to something secure.
She'd always assumed that Gabriel was a girl's name.
He hadn't always been a butler.
2
for a very long time
I've always wanted to go to Paris.
John's always been keen on music.
3
for ever
I'll always remember that day.
4
if someone or something is always doing something, they do it often, especially in an annoying way
That woman next door's always complaining.