Look at the following words:
preschool– a special school that young children attend before elementary school
prepare– to get ready for an event before it happens
predate– (verb) something that happens before another thing happens These dinosaur bones predate humans.
prevent– to stop something before it happens
predict– to guess something before it happens
What do they all have in common (the same)?
Answer… They all use pre-
What does the prefix pre- mean?
Answer… before
Re-
Now look at these words:
review– look again
redo– do again
reinvent– invent again
revisit– visit again
What do these words have in common?
Answer… They all use re-
What does the prefix re- mean?
Answer… again
Sub-
And finally, look at these words:
submarine– an boat that floats under the water
subway– a train that runs under the ground
subzero– below freezing temperature
substitute– a replacement (originally- something that works instead of or under something else) Our teacher didn’t come to school today so we had a substitute teacher.
What do these words have in common?
Answer… They all use sub-
What does the prefix sub- mean?
Answer… under