| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [pron] [adv] | 3404 |
|
| 2 | be [v-ing] back [adv] | 175 |
|
| 3 | be [v-ing] [pron] back | 144 |
|
| 4 | [v-ing] [pron] back [adv] | 78 |
|
