I have had enough

I have had enough Shit,I have had enough of it! I have had enough.这个句中的had Have had enough 意思 i have had enough 这算什么句?过去完成时? If I had had enough money,I should have boght it. I have had enough.中enough是做名词,代词还是副词的? I don't want to have supper.Because I have had enough.译成中文 If I had had enough time,Iwould have done the work better.这句 I have enough of I didn’t have enough money _______ a taxi,so I had to walk _ I have had enough of all I got!You also like谁能帮我翻一下.