| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who has [not/n't] had a [noun] | 7 |
|
| 2 | who [vb -s] [not/n't] had a [noun sg] | 7 |
|
| 3 | who [vb -s] n't had a [noun] | 5 |
|
