| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [vb -s] [pron] be [v-ing] at | 6 |
|
| 2 | [pers pn] [vb -s] [pers pn] be [v-ing] at | 5 |
|
| 3 | [pers pn] [vb -s] be [v-ing] at [art] | 5 |
|
| 4 | [pers pn] [vb -s] be [v-ing] at [art] | 5 |
|
