Rules on Spelling Correction in English Grammar

Rule 1: If the word to which the suffix “full” is added ends in “LL”, one “L” is removed from the word also.
Example-:
Skill +full = skilful
Will + full= wilful

Rule 2: When the suffix “full” is added to a word, one “ L” is removed.
Example-:
Faith + full = faithful
Use + full= useful
Fruit+ full=fruitful

Rule 3:  Words of two or three syllables ending in single vowel + single consonant double the final consonant if the last syllable is stressed.
 Example-:
Permit + ed = permitted
Occur + ing =occurring
Control + ed =controlled
Begin + ing = beginning

Rule 4:  Consonant ‘I’ is doubled in the words ending in single vowel + “I” before a suffix beginning with a vowel 
Example-:
Signal + ing = signalling
Repel + ent = repellent
Quarrel + ed = quarrelled
Travel + er = traveller
Rule 5: Words ending in silent “e”, drop the “e” before a suffix beginning with a vowel 
Example-:
Hope + ing = hoping
Live + ed = lived
Drive + er = driver
Tire + ing= tiring

Rule 6: If the suffix begins with a consonant “e” is not dropped 
Example-:
Hope + full = hopeful
Sincere + ly= sincerely
Exceptions 
True + ly = truly
Nine + th = ninth
Argue + ment = argument

Rule 7:  A final “y” following a consonant changes to “i” before a suffix except “ing”. 
Example-:
Carry ed = carried
Happyly = happily
Marry + age = marriage
Beauty + full = beautiful
Exceptions
Marry + ing = marrying
Carry + ing = carrying
Rule 8:  A final “y” following a vowel does not change before a suffix. Eg:
delay + ed = delayed
Play + er = player
Pray + ed= prayed

Rule 9: When the suffix “out” is added to a word ending in “ce”, “e” is changed to “i”.
Example-:
Space + ous= spacious
Vice + ous= vicious
Malice + ous = malicious
Grace + ous= gracious

Rule 10: When the suffix “ing” is added to a word ending in “ie”, “ie” is changed to “y”.
Example-:
Lie + ing= lying
Die + ing = dying
Tie + ing= tying