| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] [verb] | 4610 |
|
| 2 | [v-ing] it [verb] | 1668 |
|
| 3 | is it [verb] | 916 |
|
| 4 | is [v-ing] it | 368 |
|
