Lesson 9a: Variations
| Keyword | Root | Plural | Past | LY | ING | R |
| pen | pen | pens | penned | penning | penned | |
| ten | ten | tens | ||||
| pep | pep | pepper | ||||
| peak | peak | peaks | ||||
| teak | teak | |||||
| peek | peek | peeks | peeked | peeking | peeker | |
| seek | seek | seeks | seeked | seeking | seeker | |
| seen | see | sees | seen | seeing | ||
| teen | teen | teens | ||||
| peep | peep | peeps | peeped | peeping | ||
| win | win | wins | won | winning | winner | |
| pike | pike | pikes | ||||
| pin | pin | pins | pinned | pinning | ||
| sin | sin | sins | sinned | sinning | sinner | |
| tin | tin | tins | ||||
| pine | pine | pines | ||||
| tine | tine | tines | ||||
| sip | sip | sips | sipped | sipping | sipper | |
| tip | tip | tips | tipped | tipping | tipper | |
| pipe | pipe | pipes | piped | piping | piped |