Lesson 15b: Variations
| Keyword | Root | Plural | Past | LY | ING | R |
| free | free | freed | freeing | |||
| breed | breed | breeds | breeding | breeder | ||
| creed | creed | creeds | ||||
| freed | free | freed | freeing | |||
| greed | greed | |||||
| creek | creek | creeks | ||||
| creel | creel | creels | ||||
| green | green | |||||
| creep | creep | creeps | crept | creeping | ||
| brig | brig | brigs | ||||
| drill | drill | drills | drilled | drilling | ||
| frill | frill | frills | frilly | |||
| grill | grill | grills | grilled | grilling | ||
| brim | brim | brims | ||||
| grim | grim | |||||
| crime | crime | crimes | ||||
| grime | grime | |||||
| grin | grin | grins | grinned | grinning | ||
| brine | brine | |||||
| drip | drip | drips | dripped | dripping | ||
| grip | grip | grips | gripped | gripping | ||
| gripe | gripe | gripes | griped | griping | griper | |
| grit | grit | gritting | ||||
| drive | drive | drives | drove | driving | driver | |
| croak | croak | croaks | croaked | croaking |