How do you use the word "had"?

Question

Am I using "had" correctly?

I have had one of the greatest moment in life ever.

I had a dog before.

I didn't have any money because I had lost my wallet a couple days ago.

He have had a wife before too.

Answer 1

The first sentence is okay until the ending, it should be, "I have had one of the greatest moments in life, ever." Second one good and third one good. Fourth one should be, "He had had a wife before too." I know it sounds stupid, but it is correct.  

Answer 2

A few corrections:

1. I had one of the greatest moments of my life.

2. I have had a dog before.

3. I didn't have any money because I lost my wallet a couple of days ago.

4. I has had a wife before, too.

I'm sorry, I can't explain why those sound more correct. Perhaps these will help you understand better:

http://www.bbc.co.uk/worldservice/learni...

http://www.learnenglish.de/grammar/verbt...

Answer 3

"Has had."

Answer 4

The first one is correct.  

The second one:  I have had a dog before.

The third one is correct

The fourth one:  He has previously had a wife before.