| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] | 300938 |
|
| 2 | be [v-ing] | 300893 |
|
| 3 | been [verb] | 149082 |
|
| 4 | [been] [v-ing] | 22656 |
|
