在短暂连词后,现在完成时用来代替将来完成时（after/as soon as/before等）：①He will hav

结论不完全正确,推论过程基本错误.
在时间状语从句中,将来要发生的事通常都用一般现在时表达.例如：
As soon as the rain stops, we will go out.
(注意你自己的例句As soon as it has stopped raining, we shall go out.
虽然语法上没错,但是没人那么说--太书面化了而且感觉啰唆)
We will eat as soon as we get there.
You will be as tall as I am when you grow up.
上面的例句基本上都是不能用现在完成时的.
在少数情况下,如果强调动作完成的状态,也可以用现在完成时.例如：
She will be forty by the time she has finished her PhD.
We won't know anything until we have completed the investigation.
以上例句都可以用现在时来取代现在完成时：
She will be forty by the time she finishes her PhD.
We won't know anything until we complete the investigation.
最后,下面这个例句用现在时和用现在完成时的意思不一样：
I will retire as soon as I have a million dollars. 我只要有了一百万美元我就退休.
I will retire as soon as I have had a million dollars. 我只要曾有过一百万美元我就退休(即使后来又没有了).