| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] [prep] the time | 13 |
|
| 2 | must be [vb pp] [prep] the time | 13 |
|
| 3 | must be [verb] [prep] the time | 13 |
|
| 4 | must be [verb] [prep] the time | 13 |
|
| 5 | must be [verb] at the time | 10 |
|
| 6 | must be [verb] at the time | 10 |
|
