| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [prep] the [num ord] | 11 |
|
| 2 | must [prep] the [num ord] | 11 |
|
| 3 | must in the [num ord] | 10 |
|
| 4 | must in the [num ord] | 10 |
|
| 5 | must [prep] the first | 9 |
|
