小学英语人教版下册的单词包括：

1. Unit 1: cat, dog, rabbit, bird, fish, turtle

3. Unit 3: apple, banana, orange, pear, watermelon, grapes

4. Unit 4: teacher, student, doctor, farmer, police officer, driver

6. Unit 6: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday

7. Unit 7: park, zoo, supermarket, library, hospital, post office

8. Unit 8: red, yellow, blue, green, orange, purple