| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [adv] been [v-ing] to | 15 |
|
| 2 | had [not/n't] be [v-ing] to | 8 |
|
| 3 | had not be [v-ing] to | 8 |
|
| 4 | had [adv] be [v-ing] to | 7 |
|
