| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [noun] | 6196 |
|
| 2 | [v-ing] at [noun] | 4590 |
|
| 3 | [was/were] [v-ing] at | 2698 |
|
| 4 | [was/were] at [noun] | 2068 |
|
