| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been quite a [noun] | 11 |
|
| 2 | must have been quite a [noun] | 11 |
|
| 3 | must [vb infin] been quite a [noun] | 11 |
|
| 4 | must [verb] been quite a [noun sg] | 11 |
|
| 5 | must [verb] been quite a [noun] | 11 |
|
