| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have n't [vb pp] how | 44 |
|
| 2 | had n't [vb pp] how | 32 |
|
| 3 | have n't realised how | 13 |
|
| 4 | have n't [vb pp] how | 9 |
|
| 5 | have n't realized how | 8 |
|
| 6 | have n't said how | 5 |
|
| 7 | have n't known how | 5 |
|
