| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb -s] be [v-ing] | 296 |
|
| 2 | it be [v-ing] at | 111 |
|
| 3 | [vb -s] be [v-ing] at | 89 |
|
| 4 | it [vb -s] be at | 15 |
|
| 5 | it [vb -s] [v-ing] at | 9 |
|
