| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but it must be [vb pp] that | 52 |
|
| 2 | but it must be [vb pp] that | 52 |
|
| 3 | but it must be said that | 17 |
|
| 4 | but it must be remembered that | 15 |
|
