| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adj] [prep] [v-ing] a | 18 |
|
| 2 | it be [adj] [prep] [v-ing] a | 14 |
|
| 3 | it is [adj] [prep] [v-ing] a | 12 |
|
| 4 | it be [adj] to [v-ing] a | 7 |
|
