This person teaches. He is a

teacher
teach + er
Someone who writes is a ________.

writer
bonus points: What is the structure of writer?
Someone who bats is a ______.
batter
< Bat + er >
Bonus points: Explain what happens to the <t>, the final consonant!
This person bakes. He is a ________.

baker
bake + er
Someone who cleans is a ______.
cleaner
Bonus points: What is the structure?
Someone who runs is a _______.
runner
<run + er >
Bonus points: Explain what happens to the <n>, the final consonant!
She walks dogs. She is a dog ______

walker
walk + er
Someone who drives is a ______.
Driver
Bonus points: What is the structure?
Someone who baby sits is a baby _________.
sitter
<sit + er >
Bonus points: Explain what happens to the <t>, the final consonant!
This ship carries aircraft. This is an aircraft ________.

carrier
<carry + er>
painter
A bug that hops on grass is a grass _________.
hopper
<hop + er>
Bonus points: Explain what happens to the <p>, the final consonant and why!
Someone who races is a ________.

racer
bonus points: What is the structure?
< + >
Someone who sings is a _______.
singer
Someone who hits is a _________.
hitter
<hit + er>
Bonus points: Explain what happens to the <t>, the final consonant!