Lesson 13a: Variations
| Keyword | Root | Plural | Past | LY | ING | R |
| berm | berm | berms | ||||
| hard | hard | hardly | harder | |||
| lard | lard | |||||
| darn | darn | darns | darned | darning | ||
| carp | carp | carps | ||||
| lark | lark | larks | ||||
| mark | mark | marks | marked | marking | marker | |
| park | park | parks | parked | parking | ||
| harm | harm | harms | harmed | harming | ||
| barn | barn | barns | ||||
| harp | harp | harps | harped | harping | ||
| mart | mart | marts | ||||
| part | part | parts | parted | parting |