How would you phrase these sentences?

How would you phrase these sentences?

He had more ability that he was had been given credit.

The bottle is so cold, my fingers hurt touching it.

He was so disappointed to be watching the game from home/that he had to watch from home.

You know its a good show when/if John watches it.

This is the one I really don't know how to say.
Put the font/letters in black not red.
Use black for the font not red. [typing in email in red and someone says this]

Can you put guarantee ME ....
Can you guarantee me that you will come?
Can you guarantee me a victory?

Thanks