| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [v-ing] | 842 |
|
| 2 | [prep] [conj] it is | 231 |
|
| 3 | [prep] it is [v-ing] | 30 |
|
| 4 | [prep] [conj] is [v-ing] | 6 |
|
