| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pers pn] must be [vb pp] | 28 |
|
| 2 | [prep] [Wh det] must be [vb pp] | 28 |
|
| 3 | of [pron] must be [vb pp] | 25 |
|
| 4 | [prep] what must be [vb pp] | 17 |
|
| 5 | [prep] what must be [vb pp] | 17 |
|
| 6 | [prep] it must be [vb pp] | 15 |
|
| 7 | [prep] it must be [vb pp] | 15 |
|
| 8 | [prep] which must be [vb pp] | 11 |
|
| 9 | [prep] which must be [vb pp] | 11 |
|
| 10 | [prep] them must be [vb pp] | 10 |
|
| 11 | [prep] they must be [vb pp] | 10 |
|
| 12 | to [pron] must be [vb pp] | 6 |
|
| 13 | [prep] [pron] must be given | 5 |
|
| 14 | [prep] [pron] must be done | 5 |
|
| 15 | on [pron] must be [vb pp] | 5 |
|
