| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [pron] [prep] | 3795 |
|
| 2 | [be] [v-ing] back [prep] | 772 |
|
| 3 | [v-ing] [pron] back [prep] | 374 |
|
| 4 | [be] [v-ing] [pron] back | 144 |
|
| 5 | [be] [pron] back [prep] | 9 |
|
