| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] at [pron] | 1231 |
|
| 2 | be [v-ing] [prep] she | 901 |
|
| 3 | be [verb] at she | 247 |
|
| 4 | [be] [v-ing] at she | 226 |
|
