例：The government promised that a new highway would be being built next July.（政府承诺说第二年7月将有一条新的高速公路正在修建。）（此句的时间状语是具体的将来时间，所以最好用将来进行时。）（此句为被动语态）

　　15) 过去将来完成时：should have done , would have done

　　例：I believed by the end of that year an advanced version of that software would have been developed, but I was wrong.（我坚信到那年年底为止，那个软件的新版本将被开发出来。但是我错了。）（此句为被动语态）

　　16) 过去将来完成进行时：should have been doing , would have been doing

　　例：They said that by the end of the following month, the project would have been being worked for 3 years. （他们说到第二个月底为止，这项工程就已经不停地进行了3年了。）