| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [was/were] [v-ing] on [adj] | 7 |
|
| 2 | [Wh det] was [v-ing] on [adj] | 6 |
|
| 3 | [Wh det] [was/were] [v-ing] on [det] | 5 |
|
| 4 | what [was/were] [v-ing] on [adj] | 5 |
|
