| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] [pron] be [v-ing] | 90 |
|
| 2 | [v-ing] [prep] it be [verb] | 32 |
|
| 3 | [verb] [prep] it be [v-ing] | 30 |
|
| 4 | [v-ing] [prep] it [be] [v-ing] | 9 |
|
