Name _______________________________________

Lesson 13   Forms of the prefix ad


ad + vertise = advertise ad + pear = appear
ad + just = adjust ad + ply = apply
ad + mire = admire ad + point = appoint
ad + opt = adopt ad + plause = applause
ad + ministrator = administrator ad + prove = approve
ad + dressed = addressed ad + proach = approach
    ad + pliance = appliance
    ad + plication = application
    ad + proximate = approximate
    ad + pendix = appendix
    ad + petite = appetite
    ad + preciate = appreciate

The prefix ad means "to" or "toward." This prefix can be spelled in different ways. The spelling depends on the root to which the prefix is joined.

1. When the prefix ad is used to make the first six words, does the spelling of the prefix or the root change? _____
   
2. How does the spelling of ad change in the rest of the words?

_______________________________
 

 

What is the first letter of the root in each of these words? _____
   
3. How many words have double consonants because of the spelling change? _____



Lesson Generalization
The prefix ad often changes to match the first letter of a root. It changes to ap when the root begins with the letter p.

Appetite is easier to pronounce than adpetite.
Applause is easier to pronounce than adplause.

Remember why some of these words have double consonants.
One of the letters belongs to the root. One belongs to the prefix.

Mnemonic device: Remember the adaptable ad.


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