| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [was/were] [verb] on a [noun] | 31 |
|
| 2 | it was [verb] on a [noun] | 30 |
|
| 3 | it [was/were] [verb] on a [noun sg] | 28 |
|
| 4 | it [was/were] [vb pp] on a [noun] | 27 |
|
| 5 | it [was/were] base on a [noun] | 7 |
|
| 6 | it [was/were] based on a [noun] | 7 |
|
