Words Ending in -y
Change the -y to -i if the letter before the final the final -y is a consonant (try - tries), unless the suffix begins with an -i (apply - applying). Keep the final -y if the letter before the -y is a vowel: deploying, employed.
Note: The above rules do not apply to irregular verbs.
Drop a final e when the suffix begins
with a vowel unless doing so would cause confusion
(for example, be + ing does not
become bing): require - requiring; like
- liking. Keep the final e when
the suffix begins with a consonant: require
- requirement; like - likely. Exceptions
include argument, judgment, and truly.
If the final letter is a consonant, double it
only if it passes all three of these tests: (1)
its last two letters are a vowel followed by a
consonant, (2) it has one syllable or is accented
on the last syllable, and (3) the suffix begins
with a vowel: drop, dropped; begin, beginning;
forget, forgetful, forgettable.
Only one word ends in -sede: supersede. Three words end in -ceed: exceed, proceed, succeed. All other English words whose endings sound like "seed" end in -cede: concede, intercede, precede.
The suffixes -ally and -ly turn words into ADVERBS. For words ending in -ic, add -ally: logically, statistically. Otherwise, add -ly: quickly, sharply. (The only exception is public, publicly.)
No consistent rules govern words with these suffixes.
The best advice is, when in doubt, look it up.
I before e [believe, field, grief] Except after c [ceiling, conceit], Or when sounded like ay [eight, vein], As in neighbor and weigh. You may want to memorize these major exceptions:
Although the rules are very helpful, it is sometimes difficult to remember certain words, especially if they are uncommon or contain double letters.