| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] [coord] is [v-ing] | 10 |
|
| 2 | have been [vb pp] and [is] [v-ing] | 10 |
|
| 3 | has been [vb pp] [coord] [is] [v-ing] | 10 |
|
