| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] [prep] [v-ing] | 174 |
|
| 2 | it is [adj] [prep] [v-ing] | 166 |
|
| 3 | [pron] is concerned [prep] [v-ing] | 19 |
|
| 4 | it [be] concerned [prep] [v-ing] | 15 |
|
| 5 | it be concerned [prep] [v-ing] | 15 |
|
| 6 | it [is] concerned [prep] [v-ing] | 13 |
|
| 7 | it is concerned [prep] [verb] | 12 |
|
| 8 | it is concerned [prep] [v-ing] | 12 |
|
