| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] [prep] [noun] | 1158 |
|
| 2 | also be [verb] [prep] [noun] | 580 |
|
| 3 | must also be [verb] [prep] | 121 |
|
| 4 | must also [verb] [prep] [noun] | 26 |
|
