| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] been [v-ing] | 13 |
|
| 2 | be [been] [v-ing] | 12 |
|
| 3 | [been] [been] [v-ing] | 5 |
|
| 4 | been [been] [v-ing] | 5 |
|
