| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [verb] [prep] | 40914 |
|
| 2 | [v-ing] [prep] be [verb] | 3051 |
|
| 3 | [v-ing] [prep] [verb] [prep] | 1527 |
|
| 4 | [v-ing] [prep] be [prep] | 597 |
|
