| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] | 78009 |
|
| 2 | be [adv] [v-ing] | 34956 |
|
| 3 | it be [v-ing] | 10694 |
|
| 4 | it [adv] [v-ing] | 154 |
|
