| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] at [det] [noun] | 42 |
|
| 2 | must be [verb] at [det] [noun pl] | 24 |
|
| 3 | [modal v] be [verb] at [det] times | 21 |
|
| 4 | must be [verb] at [det] time | 5 |
|
| 5 | must be [verb] at [adj] times | 5 |
|
| 6 | must [be] [verb] at [det] times | 5 |
|
| 7 | must be [verb] [prep] [det] times | 5 |
|
