"Have had" 是现在完成时态。现在完成时态用于表示过去某个时间点开始的动作或事件一直延续到现在，或者对现在造成影响的动作或事件。这个时态构成的基本形式是 "have/has + 过去分词"。
have had是什么时态
“have had”即“have done”表示现在完成时，had是have的过去分词形式，这里只不过刚好那个done又是have而已。例句：He seems to have had some sort of religious experience.他似乎有某种宗教体验。She'll have had the results by now.她现在应该知道结果了。We have had to adapt quickly to the new system.我们不得不迅速适应新制度。
have had的造句
We have had problems with the supply of raw materials to the factory.
我们在工厂的原料供应方面遇到过问题。
He seems to have had some sort of religious experience.
他似乎有某种宗教体验。
They have had a significant change in policy on paternity leave.
他们对男人休产假制度作出了重大改变。
We have had to raise our prices because of rising costs.
因为成本日益上涨，我们不得不提高价格。
In some cases people have had to wait several weeks for an appointment.
在某些情况下，人们必须等上好几周才能得到约见。
have had的用法
has /have had也可以作为一般动词，意为“拥有”“进行”“吃”“使得”“让”等。如果后接不定式，意为“不得不”。因为它们不是特殊动词，所以不能在它们后面加not构成否定句，不能把它们移到句首构成疑问句。