| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] [prep] [be] [adj] | 237 |
|
| 2 | it is [v-ing] [prep] [be] | 103 |
|
| 3 | it is [prep] [be] [adj] | 80 |
|
| 4 | it is [v-ing] [prep] [adj] | 60 |
|
| 5 | it [v-ing] [prep] [be] [adj] | 11 |
|
