| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [pron] [vb mod] be | 88 |
|
| 2 | is [pron] [modal v] be | 88 |
|
| 3 | [be] [pron] must be | 18 |
|
| 4 | be [pron] must be | 16 |
|
| 5 | [is] [pron] must be | 12 |
|
| 6 | is [pron] must [be] | 6 |
|
| 7 | is [pron] must be | 6 |
|
