| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be of | 1653 |
|
| 2 | [modal v] be of | 1653 |
|
| 3 | must be [prep] | 1101 |
|
| 4 | must be [prep] | 1101 |
|
| 5 | must be of | 86 |
|
| 6 | must be of | 86 |
|
| 7 | must [be] of | 86 |
|
| 8 | must [be] of | 86 |
|
| 9 | must be of | 86 |
|
