| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [v-ing] it | 840 |
|
| 2 | [v-ing] it [vb past] | 313 |
|
| 3 | [is] [v-ing] [vb past] | 7 |
|
| 4 | [is] it [vb past] | 5 |
|
