| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [verb] a [noun] | 678 |
|
| 2 | must [verb] [verb] a [noun] | 208 |
|
| 3 | must be [verb] [verb] [noun] | 87 |
|
| 4 | must be [verb] a [noun] | 46 |
|
| 5 | must be [verb] [verb] a | 22 |
|
