现在/过去完成时的用法和标志?现在完成进行时的用法?

一般过去时指过去发生的动作或存在的状态；
而现在完成时强调过去的事件对现在造成的影响；
过去完成时是过去的过去,一般句中有过去式做参照,且该动作在这个一般过去式之前发生；
现在完成进行时是指过去的动作到目前仍没有结束还有可能继续下去；或刚刚结束,但对现在又影响.可以有例句么？一般过去时:eg:the tape recorder was out of order last week. we had it repaired the day before yesterday. it has been in good condition ever since.现在完成时my friend Mary said that he would come to my birthday party tonight, but he hasn't come so far. 现在完成进行时i haven't seen Diana these days; i am afraid she hasn't been feeling herself.i have been reading the book these days and i can finish reading it within two days