|
Name _______________________________________
Lesson 13
The assimilated prefix ad
| de + celerate =decelerate |
ex + cuse = excuse |
| ad + celerate = accelerate |
ad + cuse = accuse |
| |
|
| re + locate = relocate |
in + tention = intention |
| ad + locate = allocate |
ad + tention = attention |
| |
|
| pro + gression = progression |
pro + nounce = pronounce |
| ad + gression = aggression |
ad + nounce = announce |
| |
|
| de + rive = derive |
re + sent = resent |
| ad + rive = arrive |
ad + sent = assent |
| |
|
| re + sume = resume |
com + prehend = comprehend |
| ad + sume = assume |
ad + prehend = apprehend |
| |
|
| 1. |
Do the words in each pair have the same root? _____
Do they have the same prefix? _____ |
| |
|
| 2. |
Look at the first word in each pair. Does the spelling of
the prefix change when it is added to form the word? _____ |
| |
|
| 3. |
What prefix is added to form the second word in each pair?
_____
How is the prefix spelled when it is joined to a root that begins
with a c? _____ with an l? ____ with a
g? _____ with an r? _____
with an s? _____ with a t? _____ with
an n? _____ with a p? _____ |
| |
|
| 4. |
Is it easier to pronounce adcelerate or accelerate?
__________
Adrive or arrive? __________ |
Lesson Generalization
When the last letter of a prefix changes to match the first letter of a root, the
prefix is said to be
assimilated.
ad + similat + ed = assimilated
(to) (same or similar) ( made similar to)
The prefix ad
is assimilated more often than any other prefix. It also causes more double-consonant
spelling problems than any other prefix.
Mnemonic device:
Remember that one of the double consonants is really the Mad Ad
in disguise.
|
| © McDougal Littell Inc. |
Grade 8 Spelling SkillBuilders |
|