| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [prep] [det] | 3554 |
|
| 2 | it [be] [prep] [det] | 2767 |
|
| 3 | it [be] [v-ing] [prep] | 2418 |
|
| 4 | it [be] [v-ing] [det] | 189 |
|
| 5 | it [v-ing] [prep] [det] | 32 |
|
