| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [v-ing] a [noun] | 509 |
|
| 2 | who have [been] [v-ing] [noun] | 149 |
|
| 3 | who have [been] a [noun] | 115 |
|
| 4 | who have [been] [v-ing] a | 43 |
|
