| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [vb pp] at [art] early | 38 |
|
| 2 | [modal v] be [vb pp] at [art] early | 38 |
|
| 3 | must be [vb pp] at [art] [adj] | 25 |
|
| 4 | must be [vb pp] [prep] [art] early | 6 |
|
| 5 | must [be] [vb pp] at [art] early | 5 |
|
| 6 | must be [vb pp] at [art] early | 5 |
|
| 7 | must be [vb pp] at [art] early | 5 |
|
| 8 | must be [verb] at [art] early | 5 |
|
| 9 | must [be] [vb pp] at [art] early | 5 |
|
| 10 | must be [vb pp] at [art] early | 5 |
|
