| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [pron] [vb mod] | 579 |
|
| 2 | is [pron] [modal v] | 579 |
|
| 3 | [be] [pron] must | 59 |
|
| 4 | be [pron] must | 56 |
|
| 5 | [is] [pron] must | 40 |
|
| 6 | is [pron] must | 28 |
|
