| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [prep] | 79530 |
|
| 2 | be [v-ing] [prep] | 79523 |
|
| 3 | been [verb] [prep] | 65865 |
|
| 4 | [been] [v-ing] [prep] | 6841 |
|
