| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] [pos pn] | 4305 |
|
| 2 | be [v-ing] at [pron] | 1231 |
|
| 3 | be [verb] at [pos pn] | 705 |
|
| 4 | [be] [v-ing] at [pos pn] | 287 |
|
