| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] they must be [vb pp] | 10 |
|
| 2 | [prep] them must be [vb pp] | 10 |
|
| 3 | [prep] they must be [vb pp] | 10 |
|
| 4 | of they must be [vb pp] | 6 |
|
| 5 | of they must be [vb pp] | 6 |
|
