| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [noun] at [noun] | 769 |
|
| 2 | [was/were] [v-ing] [noun] [noun] | 768 |
|
| 3 | [was/were] [v-ing] at [noun] | 377 |
|
| 4 | [was/were] [v-ing] [noun] at | 168 |
|
| 5 | [was/were] [noun] at [noun] | 87 |
|
