| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had be [v-ing] [prep] | 1920 |
|
| 2 | [det] be [v-ing] [prep] | 1021 |
|
| 3 | [det] had be [prep] | 35 |
|
| 4 | [det] had be [v-ing] | 32 |
|
