Lesson 4b: Variations
| Keyword | Root | Plural | Past | LY | ING | R |
| hop | hop | hops | hopped | hopping | hopper | |
| mop | mop | mops | mopped | mopping | ||
| hope | hope | hopes | hoped | hoping | ||
| mope | mope | mopes | moped | moping | moper | |
| rope | rope | ropes | roped | roping | roper | |
| run | run | runs | ran | running | runner | |
| hack | hack | hacks | hacked | hacking | hacker | |
| main | main | mainly | ||||
| rain | rain | rains | rained | raining | ||
| make | make | makes | made | making | maker | |
| rake | rake | rakes | raked | raking | raker | |
| man | man | men | manly | |||
| mane | mane | manes | ||||
| map | map | maps | mapped | mapping | ||
| rap | rap | raps | rapped | rapping | rapper |