| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] at [noun] | 122 |
|
| 2 | [Wh pn] is [v-ing] [noun] | 106 |
|
| 3 | [Wh pn] is at [noun] | 22 |
|
| 4 | [Wh pn] is [v-ing] at | 13 |
|
