| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] a | 9665 |
|
| 2 | [verb] [v-ing] a | 2887 |
|
| 3 | it [verb] [v-ing] | 1188 |
|
| 4 | it [v-ing] a | 48 |
|
