| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [pron] [prep] [verb] | 153 |
|
| 2 | [be] [verb] it [prep] [verb] | 34 |
|
| 3 | [be] [v-ing] it [prep] [verb] | 27 |
|
