| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] on an [noun sg] | 62 |
|
| 2 | [was/were] [vb pp] on an [noun] | 58 |
|
| 3 | was [verb] on an [noun] | 49 |
|
| 4 | were [verb] on an [noun] | 18 |
|
| 5 | [was/were] base on an [noun] | 17 |
|
| 6 | [was/were] based on an [noun] | 17 |
|
| 7 | [was/were] [v-ing] on an [noun] | 8 |
|
| 8 | [was/were] [verb] on an [noun prp] | 5 |
|
