| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [v-ing] a [noun sg] | 1889 |
|
| 2 | [v-ing] on a [noun sg] | 106 |
|
| 3 | was [v-ing] on a | 15 |
|
| 4 | was [v-ing] on [noun sg] | 7 |
|
