1
1. is - are
2. is taking - takes
3. mouses - mice
4. knifes - knives
5. writes - is writing
6. much - many
7. they - their
8. puppys - puppies
2
1. He usually plays tennis in the afternoon.
2. What is Peter doing in the kitchen now?
3. We swam in the river last summer.
4. I don't get up early every day.
5. Why is she happy?
6. When will he come home tomorrow?
3
1. have
2. is
3. chicken
4. take
5. tail
6. put
7. hand