He seems to have (got)a lot out of the course.

He seems to have (got)a lot out of the course.
请问have后面不是要加过去分词吗,为什么不用gotten?

have got是个固定搭配哦...附上点资料供学习...
只用have,不用have got的情况
在英语口语中,常用have got和have got to分别代替 have 和 have to.
如：I have an English－Chinese dictionary.＝I have got an English－Chinese dictionary.
我有一本英汉词典.
She has a headache.＝She has got a headache.她患头痛.
Have you got to go home now?＝Do you have to go home now?你现在必须回家吗?
但在下列六种情况下,只能用have,不能用have got：
1.在助动词、情态动词之后.
如：He doesn't have got a computer.（×）
He doesn't have a computer.（√）
He hasn't a computer.（√）
He may have got a new story－book.（×）
He may have a new story－book.（√）
2.在动词不定式之后.
如：We would like to have got a dog.（×）
We would like to have a dog.（√）
3.在过去时或完成时中.
如：Lucy had got a new dress yesterday.（×）
Lucy had a new dress yesterday.（√）
I have had got the pen for two days.（×）
I have had the pen for two days.（√）
4.用作使役动词,作“使、让”讲时.
如：We have got her wait there by herself.（×）
We have her wait there by herself.（√）
5.当have与动词转化来的名词构成短语时.
如：have a look；have a rest；have a drink；have a walk等.
6.在一些固定习语中.
如：have a good time； have break fast； have lessons； have sports等.
（1）现在完成时结构have got在口语中相当于一般现在时have的意义,表示“有”.不过,在美国英语中常用have,而在英国英语中则常用have got.
e.g.他有一个兄弟.
He has got a brother．（英式）
＝He has a brother．（美式）
⑵这两种表达结构在问句方式上略有不同,现在完成时结构只有一种疑问方式,即：Have／Has．．．got．．．?而一般现在时结构有两种疑问方式,即：Do／Does．．．have．．．?或Have ／Has．．．?
你有一把雨伞吗?
①Have you got an umbrella?
②Do you have an umbrella?
③Have you an umbrella?