| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [adv] be [v-ing] | 606 |
|
| 2 | who had be [v-ing] | 470 |
|
| 3 | who had [adv] be | 461 |
|
| 4 | who [adv] be [v-ing] | 38 |
|
