| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 79523 |
|
| 2 | be [v-ing] [pron] | 28826 |
|
| 3 | [v-ing] [pron] [prep] | 21913 |
|
| 4 | be [pron] [prep] | 10993 |
|
