| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which they [modal v] [vb infin] | 745 |
|
| 2 | which [pron] must [vb infin] | 207 |
|
| 3 | [pron] they must [vb infin] | 65 |
|
| 4 | which they must [verb] | 32 |
|
