| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [noun sg] | 787 |
|
| 2 | have been an [noun sg] | 743 |
|
| 3 | have been [v-ing] an | 134 |
|
| 4 | been [v-ing] an [noun sg] | 74 |
|
