| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] had [be] [v-ing] at | 5 |
|
| 2 | [conj] had [been] [v-ing] at | 5 |
|
| 3 | [conj] had be [v-ing] at | 5 |
|
| 4 | [conj] had been [v-ing] at | 5 |
|
