HELLO!! 
HERE I SUGGEST YOU SOME EXERCISES TO PRACTICE IN THE NET IN ORDER TO BE AWARE OF THE DIFFERENCES BETWEEN THE PRESENT SIMPLE AND PRESENT CONTINUOUS TENSES. I GIVE YOU SOME ADRECES
Ex 1. Grammar focus: Uses of the Simple Present.
http://www.britishcouncil.org/learnenglish-central-grammar-grammar-games-archive.htm#P
*Instructions: Go to this link and click on Present simple, later on “instructions” and do the game. Once you have finished, click on “check answers”. To finish this quick review, check your answers and complete the assessment chart at the end of this worksheet
Ex 2. Grammar focus: Present Simple forms.
http://www.usingenglish.com/quizzes/65.html
*Instructions: Go to this link, before doing the quiz, please read the given instructions. After doing the exercise check your answers by clicking on “grade me”. To finish complete the assessment chart at the end of this worksheet
Ex 3. Grammar focus: Uses of the Present Continuous.
http://www.britishcouncil.org/learnenglish-central-grammar-grammar-games-archive.htm#P
Go to this link and click on Present Continuous. Later on, read the instructions and do the game. When you have finished, press “submit” to check your answers and complete the assessment chart at the end of this worksheet.
Ex 4. Grammar focus: Uses of the Present Continuous.
http://www.usingenglish.com/quizzes/155.html
*Instructions: Go to this link,read the instructions and do the quiz. Later,when you have finished, check your answers by clicking on “grade me” and complete the assessment chart at the end of this worksheet.
Ex 5. Grammar focus: Uses of Present S. vs Present C.
http://www.usingenglish.com/quizzes/66.html
*Instructions: Go to the previous link ,read the instructions and do the quiz.When you have finished, check your answers by clicking on “grade me” and later complete the assessment chart at the end of this worksheet.
Ex 6. Grammar focus: Usage of Present S. vs. Present Continuous
http://www.englishpage.com/verbpage/verbs1.htm
*Instructions: Go to the previous link and read the instructions to the exercise. When you have finished, click “check” to check your answers and complete the assessment chart.
Ex 7. Grammar focus: Usage of Present S. vs Present C.
http://www.englishpage.com/verbpage/verbs2.htm
*Instructions: Go to the link, read the instructions, do the exercise and click “check” to check your answers.Once you’ve checked your answers, complete the assessment chart below.