Simple Present

The Simple present is represented in 3 forms:

• Positive: Ex: My dog has spots
• Negative: Ex: My dog haven't spots
• Interrogative: Ex: Has my dog spots?
  

You can use it in very diferents situations:

• Daily routine: Ex: My cat is very selfish.

Now, Simple Present VS Present Continious:

• The present continious is used when we are talking about the present: 
  

  Ex: I'm playing basketball NOW.

• In the Simple Present, we put the letter "S" from "IS" in the following verb.(alone in the 3th person sentences):

          Ex: He puts the flowerpot in the flat roof.

Credits & Bibliography:

www.englishpage.com/verbpage/simplepresent.html

http://www.oup.com/elt/global/products/inenglish/starter/a_grammar/ine_starter_grammar03/