Rule1⃣:

When the suffix “full” is added to a
word, one “ I” is removed.
Faith + full = faithful
Use + full= useful

Rule 2⃣:

If the word to which the suffix “full”
is added ends in “ll”, one “I” is removed from
the word also.
Skill +full = skilful
Will + full= wilful

Rule3⃣ :

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

Rule 4⃣:

Consonant ‘L’ is doubled in the words
ending in single vowel + “I” before a suffix
beginning with a vowel eg.
Signal + ing = signalling
Repel + ent = repellent
Quarrel + ed = quarrelled
Travel + er = traveller

Rule 5⃣:

Words ending in silent “e”, drop the
“e” before a suffix beginning with a voweleg.
Hope + ing = hoping
Live + ed = lived
Drive + er = driver
Tire + ing= tiring

Rule 6⃣:

If the suffix begins with a consonant
“e” is not dropped e.g
Hope + full = hopeful
Sincere + ly= sincerely
But,
True + ly = truly
Nine + th = ninth
Argue + ment = argument

Rule 7⃣:

A final “y” following a consonant
changes to “i” before a suffix except “ing”.
Eg.
Carry + ed = carried
Happy + ly = happily
Marry + age = marriage
Beauty + full = beautiful
But,
Marry + ing = marrying
Carry + ing = carrying

Rule8⃣:

A final “y” following a vowel does not
change before a suffix. Eg:
Obey + ed = obeyed
Play + er = player
Pray + ed= prayed

Rule 9⃣:

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

Rule🔟:

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