| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] be [v-ing] at | 2637 |
|
| 2 | [vb -s] [pers pn] be [v-ing] | 903 |
|
| 3 | [vb -s] be [v-ing] at | 89 |
|
| 4 | [vb -s] [pers pn] be at | 18 |
|
