i haven't it 对么

是对的.相当于现在常说的I don't have it.
老式英语会这样说,不算错,但是现在很少用的.
I haven't a pen=I don't have a pen.

对的...
我没有...也可以说 “I haven't got it.”

可以这么说

是绝对的错误的,没有这种表达方式的.
正确的是I do not have it .

yes

是错误的
如果你要说"我没有某个东西"的话,要说I haven't got it或者I don't have it

如果你要说"我还没有做某事"的话,必须说I haven't done something

以上两种情况要么就只说I haven't,不能加it