| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this must [be] [vb pp] for | 8 |
|
| 2 | this must be [vb pp] for | 8 |
|
| 3 | this must [be] [vb pp] for | 8 |
|
| 4 | this must [be] [vb pp] for | 8 |
|
| 5 | this must be [vb pp] for | 8 |
|
| 6 | this must [be] [vb pp] for | 8 |
|
