| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] at the | 84 |
|
| 2 | [modal v] start at the | 27 |
|
| 3 | must start [prep] the | 13 |
|
| 4 | must start [prep] the | 13 |
|
| 5 | must start at [art] | 6 |
|
| 6 | must start at the | 5 |
|
