| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [art] | 32032 |
|
| 2 | [be] [v-ing] back | 1514 |
|
| 3 | [v-ing] back [art] | 399 |
|
| 4 | [be] back [art] | 24 |
|
