| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] [art] first | 5217 |
|
| 2 | must [verb] [prep] [art] | 1432 |
|
| 3 | must [verb] [art] first | 18 |
|
| 4 | must [prep] [art] first | 9 |
|
