| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had be [v-ing] [prep] | 1920 |
|
| 2 | be [v-ing] [prep] [num] | 1446 |
|
| 3 | had be [prep] [num] | 112 |
|
| 4 | had be [v-ing] [num] | 24 |
|
