My son has already started writing a story using the vocab words

Legendary gaped glared muttered flinched fluke snickering stunned.
He is king of confused , can you correct the mistakes and help us in completing it.
Below is the story:

In December 2015 I will be playing football as a goal keeper with a legendary team"Barcelona" against "Chelsea" which both teams have strong players.
Chelsea team was stunned , how will they accept a beginner goal keeper to join their team.
The match has startred and I was ready to catch the ball. All the crowds were snickering that I will let the team loose and not get the champion. As the ball came towards me with the strongest football player"Eden Hazard" i muttered" I'm going to surprise you all".
As the ball came closer, Eden shot the ball which was not near to me but I was was able to catch it.
Every one was shocked and Eden gapped this is impossible.

4 answers

I'll correct your errors. As a story, your son is doing very well!

I was going to play football as a goal keeper with a legendary team, Barcelona, against Chelsea. Both teams have strong players. The Chelsea team was stunned. How would they accept a beginner goal keeper on their team?

When the match started I was ready to catch the ball. The crowd was snickering. The were afraid I would let the team lose and not get the championship. As the strongest player, Eden Hazard, came towards me with the ball, I muttered, "I'm going to surprise you all." Eden shot the ball, which was not near to me, but I was able to catch it! Everyone was shocked. Eden gaped. This was impossible.

Note that verb tenses should match. Mixing future with past is confusing. I have inserted commas and corrected quotation marks. Barcelona and Chelsea are cities (the teams have names, which might be in quotation marks, but not the cities). I also corrected a couple of run-on sentences.

You can go on: ...this was impossible. It was a fluke. Eden Hazard glared at me. To use the word "flinched", you might write, "I flinched, but I was able to catch it."
Thank you very much...

How can I let him end the story?
Did they win the game and the championship? Win or lose, that's the end of the story.
Yes they won