for, four, fore

For or for means on behalf of,  in order to,  with the object of,  in place of, in consideration of,  in favor of, or with the purpose of--
We are doing this for him.
We are going out for a steak.
She wants us to be there for dinner.
You could have another potato for a vegetable.
We paid too much for the steak.
They charge $40 for a steak.
We all voted for steak.

Four or four means the number 4--
We will have four guests tonight.
There are four more steaks in the freezer.

Fore or fore means in the front; ahead of in time or place--
The company is bringing its new product to the fore with an advertising campaign.
He started to learn all the fore and aft parts of the ship.
Fore! is also a shout of warning when playing golf. It means heads up, or look out for the ball--
Make sure to duck when you hear someone yell "fore!".

Now that you know that you can say--
"I had to wait for four other golfers to swing before I could shout fore!"

Note--"forward" means ahead, or to send ahead, as in to forward mail, or to move forward--
No need to explain, just forward the email to me.
Note # 2--"foreword" is a note of explanation at the beginning of a book--
The foreword explains the history of the work.
Note # 3--"fore-" is also used as a prefix ( word beginning )--
They may foreclose on our mortgage.
"Four score and seven years ago, our forefathers..."
The eerie old house gave them a sense of foreboding.