| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [art] [adj] [adj] | 118 |
|
| 2 | [modal v] [verb] [art] first [adj] | 68 |
|
| 3 | [vb mod] [verb] [art] first [adj] | 68 |
|
| 4 | must [verb] [art] first [adj] | 6 |
|
