| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [verb] | 51061 |
|
| 2 | it be [v-ing] | 10694 |
|
| 3 | [pron] be working | 2319 |
|
| 4 | [pers pn] be working | 2042 |
|
| 5 | it be work | 223 |
|
| 6 | it [be] working | 169 |
|
| 7 | it be working | 169 |
|
