Prefixes
• reading standard=1.8 Use knowledge of
prefixes to determine the meaning of words.
Prefixes
• Today we are going to use prefixes to
determine the meaning of words.
• Determine= figure out
• What are going to do today?
• What are we going to determine?
Prefixes
• If you untie your shoe, are you making a
bow or taking it out?
• If you rewrite your letter, are you writing it
for the first time or second time?
• If it is impossible to swim to China, can you
do it or not?
The way we knew
exactly what was
meant was by
adding a prefix.
A prefix is a word
part added to the
beginning of a
base word.
Please keep in mind…the base word is a word by itself. Example pre-read. Read is a word
by itself without the prefix “pre”. Pre + read=pre-read
What is a prefix?
A prefix changes
the meaning of a
word.
Prefixes and
Definitions
Examples
im- not
improper
in- not
incomplete
bi- two
bicycle
non- not
nonstop
dis- not or opposite of
disagree
Re-do again
reread
Pre-before
Pre-read
Mis-incorrect
misspell
Prefixes
improper
incomplete
Prefixes
bicycle
nonstop
Prefix
disagree
reread
Prefixes
Pre-read
misspell
Importance
• Why is it important to know prefixes?
WARNING!
Just because a word begins with im, re, or
another prefix, doesn’t mean it is a prefix.
• Eating a good breakfast is important.
• The mailman received the mail.
If there is no base word, then it’s not a prefix.
Ceive or Portant don’t mean anything by
themselves
•
•
•
•
Read the sentence.
Think: “What is the sentence about?”
Look at the prefix definition.
Choose and write the best prefix for the
sentence.
Prefixes
• Choose and write the best prefix for the
sentence.
• 1. Please _______ my glass with milk.
(fill again)
2. You must _________ the oven to 300
degrees. (heat again)
Prefixes
• Choose and write the best prefix for the
sentence.
• 3. He _____ his steps through the woods.
(traced again)
• 4. You should _____ your notes before a
test. (view again)
Review
• A prefix is a word part added to the
beginning of a base word.
• A prefix changes the meaning of a
word.
Prefixes
bicycle
nonstop
“That’s nonsense,” said
his brother Jake. “You can
use my bike.”
“Gee, thanks,” said
Randy, hopping on the
bike.
“See, I can be likable!”
said Jake with a grin.