| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [is] [v-ing] the | 238 |
|
| 2 | [is] [v-ing] at the | 226 |
|
| 3 | who [is] at the | 19 |
|
| 4 | who [is] [v-ing] at | 17 |
|
