PRESENT SIMPLE OR PRESENT CONTINUOUS

Use the Present Continuous with Normal Verbs to express the idea that something is happening now, at this very moment.

Spelling of Verb + ING

For many verbs we make the ING form by simply adding -ING to end of the verb.

• eat – eating
• speak – speaking
• cook – cooking
• start – starting
• do – doing
• stay – staying
• fix – fixing
• try – trying

Verbs ending with -e (with the exception of verbs ending in -ee and -ie)

Drop the -e and add ING

• hope – hoping
• ride – riding
• make – making
• write – writing

Verbs ending with -ee

Just add -ING

• agree – agreeing
• flee – fleeing
• see – seeing

Verbs ending with -ie

Change the -ie to -y and add -ING

• die – dying
• tie – tying
• lie – lying

Verbs ending with one vowel and one consonant (with the exception of w, x, and y)

For one syllable verbs

double the consonant and add -ING

• jog – jogging
• sit – sitting
• run – running
• stop – stopping

For two syllable verbs

If the 1st syllable is stressed, just add ING

• answer – answering
• offer – offering
• listen – listening
• visit – visiting

If the 2nd syllable is stressed , double the consonant and add ING

• admit – admitting
• prefer – preferring
• begin – begining

NOW, THE DIFFERENCE BETWEEN THE PRESENT SIMPLE AND PRESENT CONTINUOUS IS, PRESENT SIMPLE IS FOR ROUTINES, THINGS THAT YOU ALWAYS, USUALLY, SOMETIMES DO, WITH A FREQUENCY OF TIME, THAT IS WHY THE ADVERB OF FREQUENCY GOES WITH PRESENT SIMPLE.

THEN, PRESENT CONTINUOUS IS AN ACTION I DO RIGHT NOW, AT A PERIOD OF TIME, AND AFTER THAT, IT ENDS.

http://englishteacherdotme.wordpress.com/tag/present-simple-or-present-continuous/