have+过去分词和had的用法有什么不同答:1、表示到现在为止:already ,yet ,just ,ever, never ,before ,since ,so far, until now ,by now ,up to now.2、表示最近:recentl,lately in the past/last few years 3、包含现在在内的时间状语:this morning/afternoon,all the year ,all day had加过去分词 分两种情况:由时间状语来...