| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but you must [vb infin] [verb] | 32 |
|
| 2 | but you must [vb infin] [verb] | 32 |
|
| 3 | but you must [vb infin] [vb pp] | 23 |
|
| 4 | but you must have [verb] | 22 |
|
| 5 | but you must [vb infin] [to-vb] | 8 |
|
