| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [been] [art] [noun] | 277 |
|
| 2 | [modal v] [verb] [been] [art] time | 17 |
|
| 3 | must [verb] [be] [art] time | 10 |
|
| 4 | must [verb] [been] [art] time | 10 |
|
