| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [vb pp] [prep] | 4919 |
|
| 2 | he must be [vb pp] | 87 |
|
| 3 | he must be [prep] | 34 |
|
| 4 | he be [vb pp] [prep] | 24 |
|
