| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] pay [pron] back | 5 |
|
| 2 | [be] [v-ing] pay [pers pn] back | 5 |
|
| 3 | [be] [v-ing] pay [pron] back | 5 |
|
| 4 | [be] [v-ing] to pay [pron] back | 5 |
|
