At first, I was surprised because it was not my usual time and I had made no further arrangements with my teacher but Monika had already done it yesterday.
此句源于一本英文小说，请问此句过去完成时和yesterday连用，是不是符合语法？
当说话人在中午或下午谈论上午发生的事情时，会用一般过去时，然后再提及昨天发生的事情，昨天就是今天上午这个过去时间的过去，自然要用过去完成时了。比如 I met Tom this morning . He had come back from Beijing yesterday.
