| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 79523 |
|
| 2 | be [v-ing] [prep] | 71140 |
|
| 3 | be [prep] [prep] | 1989 |
|
| 4 | [v-ing] [prep] [prep] | 1071 |
|
