| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] they [vb infin] [pron] | 675 |
|
| 2 | they must [vb infin] [pron] | 198 |
|
| 3 | [verb] they must [vb infin] | 137 |
|
| 4 | [verb] must [vb infin] [pron] | 12 |
|
