| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it had n't occurred | 20 |
|
| 2 | it had n't taken | 16 |
|
| 3 | it had n't happened | 16 |
|
| 4 | it had n't got | 12 |
|
| 5 | it had n't worked | 9 |
|
| 6 | it had n't rained | 6 |
|
| 7 | it had n't seemed | 6 |
|
| 8 | it had n't helped | 5 |
|
