＇d be=would be 意思是：过去常常,过去习惯干.
又如：He would go to see his uncle once a week他过去常常一周一次去看他叔叔（现在去不去?未可知, 不一定）
注意区别于used to :He used to go to see his uncle once a week他过去常常一周一次去看他叔叔.(意思是：现在不去了）