| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had be [v-ing] [prep] [det] | 127 |
|
| 2 | [Wh det] be [v-ing] [prep] [det] | 103 |
|
| 3 | [Wh det] had be [v-ing] [prep] | 75 |
|
| 4 | [Wh det] had be [v-ing] [det] | 5 |
|
