| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] base on a [noun] | 87 |
|
| 2 | it [was/were] on a [noun] | 38 |
|
| 3 | it [was/were] base on [noun] | 12 |
|
| 4 | it [was/were] base on a | 11 |
|
