| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] an [noun] | 351 |
|
| 2 | [was/were] [v-ing] on [noun] | 308 |
|
| 3 | [v-ing] on an [noun] | 137 |
|
| 4 | [was/were] on an [noun] | 29 |
|
| 5 | [was/were] [v-ing] on an | 26 |
|
