| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [vb mod] be | 138 |
|
| 2 | [is] [modal v] be | 138 |
|
| 3 | [be] must be | 18 |
|
| 4 | [is] must [be] | 15 |
|
| 5 | [is] must be | 15 |
|
| 6 | [is] must be | 15 |
|
| 7 | [is] must [be] | 15 |
|
