| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] for a | 760 |
|
| 2 | must [be] [verb] for | 340 |
|
| 3 | must [be] [verb] a | 98 |
|
| 4 | must [verb] for a | 28 |
|
| 5 | must [be] for a | 7 |
|
