| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have be | 21175 |
|
| 2 | [vb mod] have be | 21175 |
|
| 3 | must [verb] be | 3545 |
|
| 4 | must [vb infin] be | 3545 |
|
| 5 | must have be | 3434 |
|
| 6 | must have [be] | 3376 |
|
| 7 | must have be | 3376 |
|
