242 Unit 4 | Workbook Answer Key
© 2013 Core Knowledge Foundation
Unit 4 85
Name:
X.X9.2
Grammar Review
See the “What is it? What was it? Riddles” below. For the first riddle, change the present tense
sentences to past tense. For the second riddle, change the past tense sentences to present tense.
Example:
What is it? Riddle (present tense) What was it? Riddle (past tense)
It is made of wood. It was made of wood.
It is long and pointed at one end. It was long and pointed at one end.
It has colorful paint on it. It had colorful paint on it.
I erase mistakes with it. I erased mistakes with it.
It writes great stories. It wrote great stories.
a pencil
What is it? Riddle (present tense) What was it? Riddle (past tense)
I sit on the seat and push off. ____________________________
It flies high up and back and I hold on tightly. ____________________________
I enjoy being on it. ____________________________
My hair swishes back and forth when I ride. ____________________________
It is on the playground. ____________________________
I sat on the seat and pushed it off.
I enjoyed being on it.
It was on the playground.
a swing
It flew high up and back and I
held on tightly.
My hair swished back and forth
when I rode.
86 Unit 4
What is it? Riddle (present tense) What was it? Riddle (past tense)
____________________________ It had lots of pages.
____________________________
The author wrote it when he was
younger.
____________________________
An illustrator painted the pictures
in it.
____________________________ It had 45 chapters!
____________________________ I read it many times.
Complete each sentence with the correct present tense form of the verb in parentheses.
1. The fish _________________ in the lake swimming around. (be)
2. The morning
_________________ finally begun. (have)
3. The sun
_________________ up over the treetops. (be)
4. Canoes and rafts
_________________ on the water already. (be)
5. The children
_________________ their friends with them. (have)
6. Today
_________________ a great day at Smith Pond! (be)
It has lots of pages.
The author writes it when he is
younger
An illustrator paints the pictures
in it.
It has 45 chapters!
I read it many times.
a book
is
is
is
has
have
are
87
Unit 4 87
Name:
X.X
9.2
continued
Circle the correct form of the verb for each sentence.
1. In Science class, we (discuss, discusses) animals and their habitats.
2. Students (talk, talks) excitedly as animals (am, is, are) a favorite topic.
3. Julie (suggest, suggests) we go on a field trip to the zoo.
4. Mrs. Jones, our teacher, (say, says) she will look into getting a bus to take us to
the zoo.
5. The whole class (thank, thanks) Julie for her wonderful suggestion.
Write sentences using the following verbs:
1. fixed
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
2. teaches
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Answers may vary.
Answers may vary.
89
Unit 4 89
Name:
9.3
Practice Using Suffixes –ist and –ian
Read each sentence. Decide which word from the box replaces the underlined meaning and
write it on the line. Write the part of speech for the word as well.
mathematician magician violinists artist musician cartoonist
1. My cousin is a person who makes drawings that are intended to be funny for
his college newspaper and he makes really funny images!
Word: ___________________ Part of Speech:_______________________
2. There was a person who is skilled in doing impossible things by saying special
words or performing special actions at the neighborhood carnival who did
tricks with cards, scarves, and even a bird.
Word: ___________________ Part of Speech:_______________________
3. A person who is skilled in the study of numbers, amounts, shapes, and
camp last summer to work with students on hard problems.
Word: ___________________ Part of Speech:_______________________
4. During two of the songs at the orchestra concert, the people who play a musical
instrument with four strings that is held under the chin and played with a bow
sat still and did not play while the rest of the orchestra kept going.
Word: ___________________ Part of Speech:_______________________
noun
noun
noun
noun
cartoonist
magician
violinist
mathemetician