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