| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which you must [vb infin] | 29 |
|
| 2 | [prep] you must [vb infin] | 16 |
|
| 3 | [prep] which you must | 15 |
|
| 4 | [prep] which must [vb infin] | 14 |
|
