| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] it [prep] [verb] | 75 |
|
| 2 | [be] it [prep] [v-ing] | 56 |
|
| 3 | [be] [pron] [prep] working | 8 |
|
| 4 | [be] it [prep] work | 8 |
|
