| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 71140 |
|
| 2 | it be [prep] | 23929 |
|
| 3 | it be [v-ing] | 10694 |
|
| 4 | it [v-ing] [prep] | 589 |
|
