think k back回想
think back on回想起
think back song回想曲
think back la回想
think back then回想起来;想想从前
Think back on yesterday回望过去的日子;回首过去;回到过去
When I think back当我回想起过去的
I think back想当年
think back to those回想起那些时光
PHRASAL VERB（动词词组） If you think back, you make an effort to remember things that happened to you in the past. 回想
I thought back to the time in 1995 when my son was desperately ill.
我回想起1995年我儿子病重的那段时间。