| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have | 5556 |
|
| 2 | which [modal v] have | 2226 |
|
| 3 | which must [verb] | 355 |
|
| 4 | which must [vb infin] | 354 |
|
| 5 | which must have | 156 |
|
