| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] not be forget that | 44 |
|
| 2 | [pers pn] [vb mod] not be forgotten that | 44 |
|
| 3 | [pers pn] should not be forget that | 32 |
|
| 4 | [pers pn] must not be forget that | 12 |
|
