| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [pron] | 28826 |
|
| 2 | be [v-ing] back | 1514 |
|
| 3 | [v-ing] [pron] back | 744 |
|
| 4 | be [pron] back | 19 |
|
