| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [v-ing] [prep] [adj] | 304 |
|
| 2 | [been] [v-ing] on [prep] [adj] | 63 |
|
| 3 | had [been] [v-ing] on [prep] | 58 |
|
