| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [prep] | 10464 |
|
| 2 | [v-ing] [prep] be | 9458 |
|
| 3 | [v-ing] [prep] [prep] | 1071 |
|
| 4 | [v-ing] be [prep] | 399 |
|
