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The “able” or “ible” Spelling Rule

The "able" or "ible" Rule

The “able” or “ible” Spelling Rule

By far, writers struggle over the spelling of suffixes more so than the spelling of prefixes or roots. Of the eight conventional spelling rules, all but one (the before e) covers the spelling of suffixes. Of course, the spelling of the root (either an incomplete root or a base word) determines which suffix spelling to use in most cases.

The “able” and “ible” suffixes give writers fits because both sound similar (if not the same). Both are two syllables and both have the schwa /uh/ sound in each syllable. Abandoning the proper diacritical pronunciation marks, we would provide this approximate pronunciation for both “able” and “ible” suffixes: úh / buhl.

Sometimes the “ible” suffix tends to have more of this pronunciation: í (pronounced /ĭ/) / buhl.

About 80% of these suffixes have the “able” spelling (http://www.spellitright.talktalk.net/ends8.html), so if you must guess, don’t guess “ible.” Additionally, the list of “able” suffix new words is growing; no new “ible” suffix words are being added to our language. However, spelling isn’t solely about educated guessing; it’s about applying the rules and memorizing the few which don’t conform.

The “able” or “ible” Spelling Rule

End a word with “able” if the root before has a hard /c/ or /g/ sound (despicable, navigable), after a complete root word (teachable), or after a silent e (likeable). End a word with “ible” if the root has a soft /c/ or /g/ sound (reducible, legible), after an “ss” (admissible), or after an incomplete root word (audible).

Note that a complete root word is called a base word.

Exceptions to the rule: collapsible, contemptible, flexible, formidable, indomitable, inevitable, irresistible, memorable, portable, probable

Check out the song! The song focuses on the “able” rule (as “able” is the most frequent spelling of the two and adds “but for all others add “ible.” Like many things in life, if it’s not one thing, it’s the other. 

The “able” or “ible” Rule (to the tune of “John Jacob Jingleheimer Schmidt”

Base words add “able” to the end,

John Jacob Jingleheimer Schmidt,

As do word parts,

That’s my name, too.

That end in silent e

Whenever we go out-

Or with hard c or g

The people always shout,

But for all others add “i-b-l-e”.

Saying, “John Jacob Jingleheimer Schmidt.”

*****

Differentiated Spelling Instruction Grades 4-8

Differentiated Spelling Instruction

I’m Mark Pennington, author of the full-year Differentiated Spelling Instruction programs for grades 4, 5, 6, 7, and 8. The grade-level programs include weekly tests, based upon conventional spelling rules and developmental spelling patterns, weekly spelling sorts, review games, and audio links to catchy spelling songs. Additionally, the comprehensive diagnostic spelling assessment (audio file included) tests spelling patterns from previous grade levels, and the corresponding worksheets allow you to pinpoint instruction according to individual needs. Each worksheet includes a formative assessment to help you determine whether students have mastered the spelling instruction. The program is simple to implement and doesn’t take up too many valuable instructional minutes. You do have other subjects to teach!

FREE DOWNLOAD TO ASSESS THE QUALITY OF PENNINGTON PUBLISHING AMERICAN ENGLISH AND CANDADIAN ENGLISH SPELLING PROGRAMS. Check out these grades 4-8 programs HERE. Administer my FREE comprehensive Diagnostic Spelling Assessment with audio file and recording matrix. It has 102 words (I did say comprehensive) and covers all common spelling patterns and conventional spelling rules. It only takes 22 minutes and includes an audio file with test administration instructions. Once you see the gaps in your middle school students spelling patterns, you’re going to want to fill those gaps.

Get the The able or ible Spelling Rule FREE Resource:

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