| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] it be [adv] | 2009 |
|
| 2 | it must be [adv] | 267 |
|
| 3 | [vb base] it must be | 83 |
|
| 4 | [vb base] must be [adv] | 7 |
|
