Theory:

Present simple tense:
Present simple tense is a verb tense form that expresses events or actions that happen continually in the present, like every day or week or month; it is also used to express events that happen usually/often and for factual information.
Example:
1. I want to sleep.
2. She does not like rice.
3. They do not wish to dance.
4. The sun rises in the east.
5. The flight arrives at 4 am tomorrow.
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Simple Present - for events happening in the present/general truths/habits/timetabled events.
 
Uses of present simple tense:
 
No.
Use
Example
1
Express habituation or Regular HabitsI play tennis every weekend.
2
General truths - facts that exist at all timesThe sun rises in the east.
3
Exclamatory sentences (beginning with here or there)
There she goes!
Here it is!
4
Expressing actions happening now. Commentary (happening
currently)
"The bear comes near the child, but the child  has no clue!"
"Ashwin bowls a beautiful ball, but it seems to have gone for a four!"
5
Future events / timetabled events
The match starts at 4 pm sharp.
The bus leaves daily at 8 am.
6
Quotes / proverbs
All is well that ends well.
A stitch in time saves nine.
7
Substitute simple future tense
If it rains, we will get wet.
As soon as he arrives, I'll call you.
 
 
Important!
It is good to note the difference between sentences that express habitual actions (events happening every day) and sentences that express current actions (events happening at the moment).
Present progressive/continuous tense:
The present progressive/continuous tense expresses an action or an event that is happeningcurrently, frequently or may continue to happen in the future.
Example:
Happening currently — She is writing her homework.
 
Happening frequently — She is always coming late for class.
 
May continue to happen in future — She is doing her masters degree.
present progressive tense_revised.svg
Present Progressive - for events in the present, or planned events to happen in the future.
 
Uses of present continuous tense:
 
No.
Uses
Examples
1
Action going on at the time of speakingShe is dancing to the new song.
2
A temporary event, not necessarily happening now.I'm learning French from my neighbour daily.
3
Event planned earlier, to happen in the future.I'm going to a movie tonight.