| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [adv] [v-ing] [prep] an [noun] | 14 |
|
| 2 | [was/were] [adv] [v-ing] [prep] an [noun sg] | 14 |
|
| 3 | was [adv] [v-ing] [prep] an [noun] | 11 |
|
