| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but they must [vb infin] | 64 |
|
| 2 | but they must [vb infin] | 64 |
|
| 3 | but they must [vb infin] | 64 |
|
| 4 | but they must have | 25 |
|
