Doubling consonants

Some verbs double the final consonant and some do not. 
Are you feeling confused about it? 
Then, keep reading:

Words ending with a Consonant-Vowel-Consonant Pattern

One-syllable words:
ED = If the word ends in a CVC pattern, it gets a double consonant + ED. 
ING = If the word ends in a CVC pattern, it gets a double consonant + ING. 
Examples:
ED = RUB > rubbed, STOP > stopped
ING = HOP > hopping, SIT > sitting

BUT

Words ending in w,x,y do not follow this rule, simply add ED, or ING
Examples: snow > snowed, box > boxing, play > playing

Two-syllable words:
ED = If the stress is on the first syllable, the word only gets one consonant + ED.
ING = If the stress is on the first syllable, the word only gets one consonant + ING.

Examples:
visit > visited, open > opened
happen > happening, enter > entering

ED = If the stress is on the second syllable, the word gets a double consonant + ED.
ING = If the stress is on the second syllable, the word gets a double consonant + ING.

Examples:
refer > referred, admit > admitted
begin > beginning, permit > permitting

Words ending in E
ED = If the word ends in E, simply add ED
ING = If the word ends in E, drop the E, add ING

Examples:
ED = smile > smiled, fine > fined
ING = dance > dancing, skate > skating

Words ending in Y
Consonant + Y
ED = If the word ends in Y, and has a consonant before it, change the Y to I and add ED.
ING = If the word ends in Y, and has a consonant before it, simply add ING.

Examples:
ED = study > studied, marry > married
ING = carry > carrying, reply > replying

Vowel + Y
ED = If the word ends in Y, and has a vowel before it, simply add ED.
ING = If the word ends in Y, and has a vowel before it, simply add ING.

Examples:
ED = play > played, stay > stayed
ING = enjoy > enjoying, stray > straying

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