The verb form is not often used. If you had to say it it would be "I was goalkeeping or He is goalkeeping for his team." But usually other words are used. "Guarding" works well for this. Or you can just say "He is playing as a goalkeeper. This is what Americans would say. Its possible that the British have a different method because soccer is not played much in the USA.

Your body

What do you do to keep your body healthy? Many people go to the gym, walk in the park, practice yoga or go swimming. But you can't forget your food. Your body needs a balance of food daily, including fruits, vegetables, water and natural juice.
To recover your energy you must have a good night's sleep. Our body is very important for us, don't forget it, ok?

Great work!

قول سائر

They said : No pain , no gain

They said, "No pain, no gain."

" is used to mark a direct quote.

Urban life...

Well everyone says that urban life is better than rural life besides the animals , but life in the city has some disadvantages in addition to its benefits.
Of course urban life is more comfortable and there are more features and more career opportunities and also cities' schools are better and bigger than villages' schools. But cities are usually very crowded and noisy because there are a lot of factories and a lot of cars. While in the village, there are a few cars and industrial factories and it's better for human health.
In general I like urban life more than rural life because live in the village beside animals and it is very hard.
[Thanks for reading my text ]

Great job.  "Inside animals" mean that you are in their bodies.  I hope you have not been eaten :)  

For the blue sentence you should sure commas not so many "and"s.  Like this:  Of course urban life is more comfortable, it has more features, more career opportunities, and it has bigger and better schools. 

Good work.  Let me know if you need any more help.

I really like "Animal Farm" by Orwell.  It seems like it is just a children's story about farm animals but it is actually talking about the Russian Revolution and the rise of Communism.  Very interesting.  I have read it several times.