| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [prep] be [v-ing] | 849 |
|
| 2 | [prep] be [v-ing] at | 212 |
|
| 3 | [vb -s] [prep] be at | 94 |
|
| 4 | [vb -s] be [v-ing] at | 89 |
|
| 5 | [vb -s] [prep] [v-ing] at | 36 |
|
