| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] it [is] | 777 |
|
| 2 | is [v-ing] it | 368 |
|
| 3 | is it [is] | 331 |
|
| 4 | is [v-ing] [is] | 204 |
|
