| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] be [v-ing] at | 2980 |
|
| 2 | [pron] [vb -s] be [v-ing] | 1907 |
|
| 3 | [pron] [vb -s] be at | 101 |
|
| 4 | [vb -s] be [v-ing] at | 89 |
|
| 5 | [pron] [vb -s] [v-ing] at | 38 |
|
