| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] they know perfectly | 6 |
|
| 2 | they know perfectly well | 8 |
|
| 3 | they know perfectly [adv] | 8 |
|
| 4 | they know perfectly well | 8 |
|
| 5 | they know perfectly [adv] | 8 |
|
