一直是

• to remain as

例句

1. 我一直是每天工作12小时，不过我再也坚持不住了。
   I've been working twelve hours a day, but I shall not be able to keep it up.
2. 那当然是约翰的妈妈。我差点把她给忘了。她一直是咱们的好朋友，对吧？
   And that's John's mum, of course. I'd almost forgotten her. She's been a good friend to us, if you like.
3. 事情一直是这样，并将继续这样下去。
   It has been thus and will continue to be so.
4. 我妹妹一直是一个勤奋的学生。
   My sister is always a studious student.