| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to [be] [v-ing] [prep] | 1303 |
|
| 2 | it [verb] to [be] [prep] | 182 |
|
| 3 | it [verb] to [be] [v-ing] | 155 |
|
| 4 | it [verb] [be] [v-ing] [prep] | 135 |
|
| 5 | it [verb] to [v-ing] [prep] | 53 |
|
