| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have [been] [art] [noun] | 277 |
|
| 2 | must have [been] [art] [noun sg] | 266 |
|
| 3 | [modal v] have [been] [art] time | 17 |
|
| 4 | must have [be] [art] time | 10 |
|
| 5 | must [verb] [been] [art] time | 10 |
|
| 6 | must have [been] [art] time | 10 |
|
| 7 | must have [been] [art] time | 10 |
|
