| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not have been a [noun] | 57 |
|
| 2 | not [verb] been a [noun sg] | 56 |
|
| 3 | not [vb infin] been a [noun] | 51 |
|
| 4 | not have been a [noun] | 50 |
|
| 5 | not [verb] been a [noun] | 33 |
|
| 6 | n't [verb] been a [noun] | 24 |
|
| 7 | not [verb] been a problem | 8 |
|
| 8 | not [verb] been a problem | 8 |
|
| 9 | not to have been a [noun] | 5 |
|
| 10 | not [to-vb] been a [noun] | 5 |
|
