| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [v-ing] at | 2033 |
|
| 2 | [v-ing] at [det] | 1424 |
|
| 3 | was [v-ing] [det] | 1243 |
|
| 4 | was at [det] | 427 |
|
