| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this must [be] [vb pp] | 200 |
|
| 2 | [adv] this [be] [vb pp] | 136 |
|
| 3 | [adv] must [be] [vb pp] | 101 |
|
| 4 | [adv] this must [be] | 17 |
|
