| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [vb pp] by [v-ing] | 36 |
|
| 2 | it [is] [verb] by [v-ing] | 36 |
|
| 3 | it [is] [verb] by [v-ing] | 36 |
|
| 4 | it is [verb] by [v-ing] | 35 |
|
