| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [prep] [noun] | 5039 |
|
| 2 | [v-ing] on [prep] [noun] | 713 |
|
| 3 | [was/were] [v-ing] on [prep] | 427 |
|
| 4 | [was/were] on [prep] [noun] | 45 |
|
| 5 | [was/were] [v-ing] on [noun] | 11 |
|
