1) The "i before e except after c" spelling rule has many exceptions, such as in words like "neighbor" and "weigh" where the pronunciation is different.
2) When adding suffixes to words, there are rules for changing "y" to "ies", adding "-es" to words ending in certain letters, and doubling consonants with one-syllable words stressed on the last syllable.
3) The "drop the 'e' rule" applies when adding suffixes to words, except when the root word ends in "-ce" or "-ge" to maintain a soft sound.