| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be of [adj] | 752 |
|
| 2 | [modal v] be of [adj] | 752 |
|
| 3 | must be [prep] [adj] | 168 |
|
| 4 | must be of [adj] | 37 |
|
| 5 | must [be] of [adj] | 37 |
|
